###### Can a person's brain get good at mathematics upon practice?

The brain has different parts that are specialised to do different tasks. One part of the brain is responsible for memorising, one part is responsible for music, one part is responsible for arithmetics and maths, etc. The neurones in each part of the brain is reinforced when you use

###### How to be smarter at math

All the suggestions here seem to focus on recommending to keep practicing as much as possible. That is certainly true. But keep in mind, mechanical practice alone will only bring you so far, especially if you do not change and adapt the ways

###### How can math improve our brains?

Yeah.One of the greatest reason of brain circulating is math..If you think deeply then you feel like you are all and that is the greatest think which you feel through mathematics ..Mathematics is all about fun. That is your logic how you can try to solve math ..Give an small example like(A+B)^2=A^2+2AB+B^2this is the normal formulaEven we proof

###### How to find the curve of best fit

The easiest way to do this is to define a fit function that is:yhat = a *sin(-b* (x - cross_over) ) * (x<cross_over) + c*sin(d*(x-cross_over))*(x>cross_over) + e*x + fThis function will be differentiable everywhere. You can also convert it to two cosines with pi/2 phase shift.You have to fit a, b, c, d, e, cross_over, and

###### How do top students study math?

Top 2% grades here.I'm not the guy you'd expect to have grades as good as that. I smoke herb, can't sustain a healthy sleeping pattern, miss lectures frequently, have not structured my day in any way whatsoever, tend to be

###### How long do mathematicians work in one day?

It varies hugely. For example, last Friday I got to the office at 10am, worked for 3 hours until about 1pm and then left. That entire time was spent working solidly on mathematics. Today, I worked from home from 9am to 11am then went to the office and worked there

###### How much weight is Bruce Wayne lifting in this image?

Bruce Wayne is [math]190[/math] cm. This very likely depends on the movie/comic and canon, I'm just going with the first Google result.In the image, Bruce Wayne is roughly [math]465[/math] pixels tall, excluding a little hair. Assuming his body has similar dimensions to mine, that would make him [math]765[/math] pixels

###### If 10 people can do a piece of work in 5 days, working 2 hours a day, how long will 2 people take to do the same work, working 5 hours a day?

(10 people) * (2 hours / day) = 20 man-hours / day(2 people) * (5 hours / day) = 10 man-hours / daySo if the trend is meant to extend to the new situation the entire task should take twice as long so 10 days.But of

###### Is exercising Mathematics good for your brain?

Actually, yes. Although the answer applies to most things that fall under the label of "mentally strenuous activity". I'm not sure that there is any research on whether practicing mathematics, learning a language, practicing chess, etc. produces stronger/different effects, so if anyone is aware of anything on that, please chime in. But it would surprise me if there

###### Is mathematics good for your brain? Which parts?

Mathematics is definitely good for my brain. I would argue that maths is good for all brains on many different levels:Avoid being ripped off in everyday life: how do you know you've been given the right change?Counting is pretty useful these days.Telling the time and doing basic time calculations in order

###### Was Aryabhatta originally from Kerala?

Aryabhata's birthplace is uncertain, but it may have been in the area known in ancient texts as Ashmaka India which may have been Maharashtra or Dhaka.Some archeological evidence suggests that Aryabhata could have originated from the present day Kodungallur which was the historical

###### What are financial derivatives?

Derivative is a security which derives it's value from another security. Example - ABC Stock Future, this consists of ABC underline stock one can either go short or long based on their particular belief. Suppose you go long on the ABC stock future when it was trading

###### What are some cool math brain teasers?

This is one of my favourites, mainly because of the surprising answer:Alice thinks of a polynomial P(x) of arbitrary, but finite, degree with strictly positive integer coefficients.Bob is allowed to ask Alice adaptive questions of the form

###### What are some useful calculator (Casio fx-991ES) hacks?

First of all, this calculator will not enable you to save data or plot graphs. From my experience, most of the useful benefits only come into use at A Level. These include being able to calculate definite integrals (don't worry if you don't know what these are yet! - AS Calculus), working out variance

###### What are the biggest frustrations about math?

I am not so good at math. But one of my biggest frustrations about math is the mathematics curriculum in schools. I'm a junior in high school. All through middle school, I took basic math. In seventh grade, I went into Pre Algebra. After a year of that, I took Algebra I. I graduated

###### What does it take to be very good at math?

I've answered this question in two different ways before that might be helpful. So you might want to consider reading them.Nick Campbell's answer to How can I be great at math? I am an A student. However, I am merely above average at math (B+ in AP Calc). I want to be great at math so

###### What was the very first mathematical fact you learned that blew your mind?

In 2009, when I was in my 9th standard; My math teacher asked the class to find the sum of the first 100 numbers.We were four friends sitting on the same bench and we thought of impressing the teacher by answering quickly.So we divided 100 into 4

###### When my dad was 33 years old, I was just 13 years old. Now his age is twice as old as my age. What is my present age?

This is basic algebra.Let's start from here:Dad's age = 33Your age = 13After a few years, say 'x'D = 33 + x Eq. 1Y = 13 + x Eq. 2Now if you want to calculate when your dad's age will be twice of yours then simply equate D = 2*Y=> 33 + x = 2*(13

###### Working out: should I have an ab day or do ab exercises every day?

As world renown fitness trainer Tony Horton says, "You don't work other parts of your body every day, then you shouldn't work abs every day."Most workouts do engage your abs, however if you want to gain more strength and definition, you should

###### 2 years ago, my age was 4 and a half times my son's age. 6 years ago, my age was twice the square of my son's age. What is the present ages of me and my son?

Let my and the son's present ages be M and S.(M-2) = 4.5(S-2), orM = 4.5S -9+2 = 4.5S-7 ...(1)M-6 = 2(S-6)^2, orM = 6+2(S^2–12S+36), orM = 2S^2–24S+78 ...(2)Equate (1) and (2)4.5S-7 = 2S^2–24S+782S^2–28.5S+85 = 0S1 = [28.5+(812.25–680)^0.5]/4= [28.5+11.5]/4= 40/4 = 10The son is 10 years and the father is 38 years, now.

###### Are people born with math abilities, or does anyone have potential to be very good at math?

It's a combination of both.I'd like to point the OP to Malcolm Gladwell's book entitled Outliers. His basic idea is that a lot of people have the potential to be very good at something, because in the end, hard work outweighs natural ability. However, he notes that one still

###### Can a very intelligent person be bad at math?

Yes. There's too much of a stigma attached to being good at math. So if Jimmy is the best math student, suddenly everyone thinks he's a damn genius.Well Jimmy ain't no genius. Jimmys brain just operates differently. You can't force kids to be good at math, and you can't force kids to like math when they have zero

###### Can I improve at maths?

Good question. There are actually two things you're going to have to address:Why have you always sucked at math; andWhat do you mean by

###### Can the theory of strings be described without reference to complex mathematics?

It can, but my experience is that lay people don't find the descriptions useful. We can say things like

###### Do official IQ tests only measure logical/mathematical intelligence?

They do NOT test logical and even less mathematical intelligence. As someone with an IQ of 55 on my spatial part, 78 on my logical-mathematical part and now on my way not only to finish my study at university but also seeing sucess on my way

###### Does human brain understand mathematics?

Addressing a packed audience on the creative life of a mathematician, the author of Birth of a Theorem, which has sold more than 100,000 copies, also explained why he believed that the human brain was unsuited to maths

###### Does practicing mental maths improve your IQ?

We need to make a number of assumptions here (which many have done) to accurately address this question.What is mental math?By mental math, I see it as 2 different types. TYPE 1: One is where we do simple calculations mentally instead of on paper like addition, subtraction, multiplication and division of

###### Father's age is double the elders sons age. After ten years, the father's age becomes triple the age of his younger's son. If the difference of their age is 15 years, than what is the present age of the father?

Answer: Present Age of Father is 50Today:Elder son's Age = xFather's Age = 2xYounger son's Age = x - 15In 10 years' time:Younger son's Age = x = 15 + 10 = x - 5Father's Age = 2x + 10 = 3(x

###### How to be great at math

While all the other answers touch base on important points, let me take you through my experience going from a complete dunce at math to gaining substantial expertise on the subject.Before I start though, let me make one thing clear, those that tell you that math is a subject where

###### How to master brain mathematical operations

If you want to train your brain to do amazing math, look up Scott Flansburg, the Human Calculator (Home) and his training program. Stan Lee included him in his list of superhumans. Brain scans show that Scott actually uses a part of the human brain that most people don't use (the part birds use for

###### How can something be both fact and theory, if to become a fact it must be first proven as a theory?

Perhaps the meaning of 'theory' should be clarified, first: the 'popular' meaning of 'theory' is almost 'guess', but as a scientific term, it means... collection of demonstrable (and demonstrated) evidence (that is never 'closed' or 'finished').Even the scientific 'guess' (a hypothesis) is an educated one, and most usually based on observations of existing theory/data. The

###### How to become better at math rapidly

IMPORTANT!Don't be discouraged by people who say you can't do it! If I could do it, you certainly can!But...There are vastly different answers to this depending on who you are.School maths and college maths are differentLet's talk about school first, since that is

###### How to make mathematics become practical

I think the most practical way to see mathematics is practical and useful for everyday life comes from using a calendar. It also comes from using a watch or time keeping device. If you continually use them to keep time, such as

###### How to practice and understand mathematics

I am not perfect in Math, but this is what helps me :Don't neglect the core concepts and the proofs.It is not necessary to memorize proofs, just make sure you understand them.The reason this is useful is that you will actually get a feel of what you

###### How do my maths improve?

Practice .Math is one of those subjects where a strong foundation is critical.I had really mean, shitty math teachers in middle school. I worked hard but I got so many condescending comments if I had wrong answers that the mental stigma made me develop a hatred towards the subject.So I was really screwed when it came to grasping

###### How do some people do multiplication with very large numbers quickly in their head?

There is a technique for doing calculations very quickly.Using regular mathematical steps, solving problems sometimes are complex and time consuming. But using Vedic Mathematic's General Techniques (applicable to all sets of given data) and Specific Techniques (applicable to specific sets of given data), numerical calculations can be done very fast.It is not

###### How does maths impact human's brains?

This Is what happened to me during 9th Standard:Till class 8 I was the Boy who thinks1.The world is a miracle..2. There are Magicians in real world3. Who use to believe others Words.. and many or are there..Then After the session was overDuring the Holidays(before attending 9th ckas) I made a Mathematics teacher(he was not a teacher but

###### I want to measure the speed at which two balls roll downhill from a height of 100 feet. If I am walking up a hill with an incline of 12 degrees, how far must I walk uphill before releasing the balls?

That takes me back to my early yearsWe need to remember SOHCAHTOA in relation to a right angled triangle. That is a triangle with one of its angles set at 90⁰In this triangle the side opposite the 90⁰ is the hypotenuse (H) the side opposite one of the other angles is the opposite side

###### In the class of 35 students the average age of students is 17 years. If the average age of students and their class teacher is 18, then what is the age of the class teacher?

You can do this type of questions orally. No need to use pen and paper, if you let your brain think to do so.Well, here is the process to think. As we know the average of any number is the

###### Is data science a career for me if I love making order out of chaos and solving problems? What other careers fit this description?

You mentioned some, but not all, of the traits that make for good data scientists. Usually dealing with data and fighting to glean valuable insights indeed includes making order out of chaos and solving problems. However, you also have to have a sense for numbers and an analytic mind. These are tools and

###### Is exercising Mathematics good for your brain?

Actually, yes. Although the answer applies to most things that fall under the label of "mentally strenuous activity". I'm not sure that there is any research on whether practicing mathematics, learning a language, practicing chess, etc. produces stronger/different effects, so if anyone is aware of anything on that, please chime in. But it would surprise me

###### Is it important to practice mathematics daily?

Tryst with MathematicsMy love for mathematics started growing when I appeared for civil services examination in 1982 with Maths as optional. However the love remained dormant for many years but came out of hibernation around 2009. I had been thinking of doing MSc in Mathematics in 2004 and had even obtained permission

###### Is it true that mental math can exercise your brain and make you smarter in general?

One way of looking at the concept of 'smart' is to time how long it takes individuals to complete a task and then use the bell curve to classify other people. Thus if you can get fast at doing mental math then according

###### Is math a good major?

What Can You Do With a Mathematics Degree?Whether you call it ‘math' or ‘maths', or prefer the traditional ‘mathematics', if you study numbers at university, your career opportunities are not only numerous, they're also fairly lucrative.Thanks to the growing importance placed on technology, big

###### Is mathematics good for your brain? Which parts?

Mathematics is definitely good for my brain. I would argue that maths is good for all brains on many different levels:Avoid being ripped off in everyday life: how do you know you've been given the right change?Counting is pretty useful these days.Telling the time and doing basic time calculations in order to successfully attend meetings for business or

###### Is not being good at math shameful?

Inherently, there is no downside to it. Fact is, you can be a contributing member of society and do everything just fine. You can raise a fine family, do great deeds and help tons of people.Really, it's fine.There is no shame, in not being good at it.The

###### Is Vsauce very good at math?

Michael Stevens (born January 23, 1986) graduated with a Bachelor's degree in Psychology and English Literature from the University of Chicago. He created and hosts Vsauce as a platform to discuss many interesting mathematical, physical, technological, and scientific topics. Nonetheless, Michael never professed himself

###### It was Sunday on Jan 1, 2009. What was the day of the week Jan 1, 2019?

Answer is Friday as there are two Leap years 2012 and 2016 included in the period. Two days are added thus Jan 1 2009 = Sunday Jan 1 2010 = Monday Jan 1 2011 = Tuesday Jan 1 2012 = Thursday (leap year) Jan 1 2013 = Friday Jan 1 2014 = Saturday Jan

###### Larry ate 1/4 of the SNICKERS chocolate bar. Next, his sister ate 1/8 of the eaten chocolate bar. Lastly, his brother ate 2/3 of the eaten chocolate bar. How much is left of the SNICKERS bar?

So they ate 1/8 and 2/3 of that "eaten" bar of chocolate? That is... disturbing.His brother/sister ate fractions of an "eaten chocolate bar"? When I eat something it goes into my mouth then down into my stomach and from there it does a rollercoaster ride of various processing

###### My Brother is 15 and I am 1/3 his age. How old am I?

You're 20, Either your brother was born on February 29 on a leap year, and has lived for 60 years but has only had 15 birthdays. Y=15×4=60. Y×1/3=X, Y/3=X, 60/3=X, X=20.Or more likely you were born on February 29 on a leap year, Like many people said you have had 5 birthdays, but you have

###### My Grandfather who is 4 times my age and he is 76 years old. How old am I?

Son's age = xSo, father's age = 4xBefore 10 years,Son's age = x-10Father's age = 4x-10Now, father's age = 10 times age of sonTherefore, 4x-10 = 10(x-10)4x-10=10x-100100–10=10x-4x90=6x6x=90→x=90/6So, x=15 this is son's age at presentFather's age will 4 times , that is, 4x=15×4=60answer source from The father's age is 4 times the age

###### My uncle used to say, 'People who play the lottery aren't very good at math.' Was he right?

Absolutely - do you know just how dumb playing the lottery is? I'll sum it up in a quote I heard (don't know the source, unfortunately): Trying to get rich by playing the lottery is like trying to commit suicide by

###### The age of the mother is twice the square of the age of her son. In eight years, the age of the mother will be 4 years more than 3 times the age of her son. What is their present age?

Son's present age is 4 years and mothers present age is 32 years. The math is as follows:SupposeSon's present age = x yearsMother's present age = y yearsThen we havey=2x^2y+8=3(x+8) +4Substituting the value of y from equation 1 in equation 2,2x^2 +8=3(x +8) +4or, 2x^2-3x-20=0or, (x-4)(2x+5)=0SoEither x=4Or x= -5/2Since age can't be negativeHence x=4And y= 2×4^2=32

###### The difference in the age of two people is 20 years. If 5 years ago, the elder one of the two was 5 times as old as the younger one, then what will their present ages be equal to?

Let the elder age is = x yearsGiven difference between the age of two is 20 years.=> younger age = x-20 years5 years ago elder age = x-5And younger age =(x-20)-5Given 5 years ago, the elder one of the two was 5 times as old as the younger one.=> x-5=5[(x-20)-5]=5[x-25]=>x-5=5x-125=>5x-x=125-5=>4x=120=>x=30Therefore elder

###### What are some common unknown maths facts?

Few Actual Maths facts.One of my favourite and most debatable facts, We know that 1 raise to the power anything is 1 but this statement is not true because 1 raise to the power infinity is not defined.Also 0 multiplied by infinity is again not defined.Some Pi facts,There is a computer called the Electronic Numeric Integrator

###### What are some mind-blowing facts about mathematics?

Everytime you see someone's profile on Facebook, you do see the beauty of mathematics.Yes, you read it correctly. Being a student, pursuing Mathematics as the Hons. subject, it is needless to state that, for me Mathematics is the other name of love and I am

###### What are some unknown facts about mathematics?

DearNice QuestionBelow List of Facts about mathematics.2 and 5 are the only primes that end in 2 or 5Zero ( 0 ) is the only number which can not be represented by Roman numerals.40 when written "forty" is the only number with letters in alphabetical order, while "one" is the only one with letters in reverse orderFrom 0 to

###### What are the best math blogs?

Well, it depends on what levels/topics you're interested in. Here at Math Vault for example, we like to fill the gap between applied and pure mathematics, so the topics tend to veer towards college math (primarily through a proof-based standpoint), calculus, linear algebra, probability, statistics, logic and

###### What are the cheerful motivational English songs worth listening for?

What a wonderful world by Louis ArmstrongI see trees of green, red roses tooI see them bloom for me and youAnd I think to myself what a wonderful world.I see skies of blue and clouds of whiteThe bright blessed the day, the

###### What are the quickest methods for multiplication?

Well, obviously by calculator would be fastest but by hand it is different.It depends on how good your maths skills are. You might be really good at mental maths, so you'd do more of that unless you had to use a method. Or you

###### What are tips and strategies for multiplication/division?

I know one personally, and would like to delineate it.Remember when you studied square of a number ending with 5.Let's say 25.25^2 = 625. How do you get that? Write 25 in the end. And then,

###### What can I tell students to show them math is important?

With boys this is easy. How can you tell how high in the tree you are if you can only see the shadow of the tree and your shadow? If you only had one arrow, how could ensure you hit the target (shoot the enemy in the eye)? What's

###### What day of the week was yesterday if 5 days before the day after tomorrow was Wednesday?

Let's say,Today is the seventh day.We need what day was yesterday?Five days before, the day after tomorrow was Wednesday. That means,Wednesday was the week's second day & the Week starts with Tuesday.So, the Third day was Thursday,Fourth day was Friday,Fifth day was Saturday,Sixth day was Sunday and,Today, the seventh

###### What is 4×4×4×4×4×4×4×4×4×4×4×4×4×4×4×4×4×4×4×4×4×4×4×4×4×0?

Hi,The question reads :4×4×4×4×4×4×4×4×4×4×4×4×4×4×4×4×4×4×4×4×4×4×4×4×4×0?Now let us restructure as following :(4×4×4×4×4×4×4×4×4×4×4×4×4×4×4×4×4×4×4×4×4×4×4×4×4)×0?(something) * 0 ?Anything multiplied by zero (0) is eventually zero (0).Therefore the answer is zero (0).Quite easily is done.Regards,Madhav SanapInsurance AdvisorLIC of India.0-9146-076-999

###### What is mathematics good for?

Mathematics asrises ad-hoc as a tool to compensate for our current inability to operate purely on empirical evidence because of technological limitations. I apologize for such a dramatic and 'out there' thesis, but I think anyone who delves into the philosophy of mathematics as

###### What is the basic idea of perturbation theory?

Perturbation or perturb may refer to:Perturbation theory, mathematical methods that give approximate solutions to problems that cannot be solved exactlyPerturbation (geology), changes in the nature of alluvial deposits over timePerturbation (astronomy), alterations to an object's orbit (e.g., caused by gravitational interactions with other bodies)Perturbation

###### What is the best way to be perfect in math?

Yeah, yeah, practice, practice.You won't get far without practice.But I bet you knew that already and were looking for something more.So here are some things that I find extremely helpful when I'm trying to learn some math.Say the math out loud. I know it sounds stupid, but it forces you to untangle the symbols,

###### What is the mathematics of the brain?

The mathematics we learn in school and college. This operates at the conscious mind level. We use it for practical purposes.The subconscious mind processing is a mystery. We do not have the technology to detect and study it directly. Emotions and

###### What is the proof for [math]\frac{1}{1^2}+\frac{1}{2^2}+\frac{1}{3^2}+\frac{1}{4^2}+\dotsb=\frac{{\pi}^2}{6}[/math]?

[math]\dfrac{1}{1^2}+\dfrac{1}{2^2}+\dfrac{1}{3^2}+\dfrac{1}{4^2}+\dfrac{1}{5^2}+...=\dfrac{\pi^2}{6}\tag{1}[/math]There is an excellent proof for this, and this proof is actually how Euler first proved this identity. Of course, I must credit my professor for showing this identity to me. (All Quora accounts are listed in the

###### What makes a theory a theory?

To may regular folks - those in particular who say

###### What makes kids give up on math?

I went to an American public school in a bad neighborhood, and those schools are worse than you can imagine. They are prisons for children. Most of the children's parents were drunkards and many were on welfare and those who worked

###### What mathematics is used in string theory?

Most of the mathematics that is used in string theory is the mathematics that is familiar to people who understand quantum field theory and general relativity. Mostly advanced calculus (including ODEs, PDEs, etc and lots of complex analysis), linear algebra, Riemannian/differential geometry and a solid understanding

###### What parts of the brain are involved when doing mathematics?

I think all areas of the brain are involved, except perhaps the ones that handle the sense of smell and taste. No, wait. Strong taste and weaker taste, stinking smell, etc. are quantifiable, at least in your own experience of it. You can

###### What should one do to become better in mathematics?

To answer this, I just want to point out that Math can mean two things: computational and proving.For computational, you need to familiarize yourself with problems. When I was in high school, all I needed was to memorize equations and know how to derive the unknowns. But when you encounter university-level mathematics, do not expect to find problems

###### What's the difference between category theory and set theory?

The set theory deals with sets (which are undefined) and strives (successively) to define all the mathematical objects as some sets. This means that set theory can be formalized as a first order single-sorted (this roughly means that the theory deals only with one kind of

###### What's the 'secret' of becoming good at maths?

I felt a little earthquake inside my head when the notification drew my attention. I couldn't believe my eyes. What !!! The question that was asked by Aniket Bhattacharyea (অনিকেত ভট্টাচার্য্য) is like Sachin Tendulkar is asking

###### When I was 10 my sister was half my age. Now I am 22 how old is my sister?

suppose your sisters age is

###### When I was 14 years old, my sister was half my age. Now I am 20. How old is she?

Case 1-Your bday falls on July 5th, her falls on September 5th.You were 14 years on July 6th,2013, your sister must be 7 years then.Now you are 20 years on July 6th, 2019, she must be 13 years nowBut you are also 20 years on October 2019.

###### When I was 18 years old, my sister was half my age. Now I am 20 years old, how old is my sister?

As per statement when this person was 18 then his sister was half of his age, means her age was 18/2=9 yearsDifference in age between his sister and him18- 9=9 yearMeans this person is elder than his sister by 9 years.This age difference will be persistently maintained throughout

###### When I was 20, my sister was half my age. Now my sister is 37, how old am I?

I believe she is 47 as by halving 20, you will calculate the number ‘10'. Now by using calculus and Aristoteles' logic, we can figure out the difference between 10 and 37 - namely 27. As your sister as ‘37', you remove 3 off of 27, giving

###### When I was 20 my sister was half of my age, how old is my sister now that I'm 40 years old?

As per statement when this person was 20 years old then his sister was half of his age, means her age was 20/2=10 yearsDifference in age between him and his sister20–10= 10 yearsMeans this person is older than his sister by 10 years.This age difference

###### When I was 22, my sister was half my age. Now my sister is 32, how old am I?

Ans. You are 43 years old.Explanation:According to question,When you was 22 your sister was half your age(i.e. 11 years)It means you are 11 years older than your sister.Now she is 32, then your age would be:= Your Sister's age + 11 years= 32 years + 11 years= 43 years.Sharing is caring.Suggestions welcome.Click

###### When I was 22, my sister was half of my age. Now I am 44, how old is she?

Your sister was 11 when you were 22. She is and always will be eleven years younger than you. So you can easily determine her age as beingx minus 11 = sister's ageWhere

###### When I was 22 years old, my sister was half my age. Now my sister is 44 years old. How old am I?

This is very interesting and tricky question of age related problem.Answer of your question is here..Questions says when you was 22 year old then your sister was half of your age.. That's means Your sister age was 11 years..Here it is clear

###### When I was 24, my brother was 1/3 my age. My sister is 3 times half my brothers age. How old will my brother be when my sister is 40? How old will I be?

When this person was 24, then his brother was 1/3 of his age means, his age was 24×1/3=8 years.His sister is 3 times half ( 3×1/2=3/2=1.5 times) of brother's age means sister age 8 × 1.5=12 yearsNow the sister has turned to 40, means number of years elapsed40–12 = 28 yearsThese elapsed years will also be counted for this

###### When I was 30 my sister was half of my age, how old is my sister now that I'm 45 years old?

As per statement when this person was 30 years old, then his sister was half of his age, means his sister's age was 30×1/2=15 yearsDifference in age between him and his sister30 – 15 = 15 yearsMeans this person's is older than his sister by 15 years.This age difference will be persistently maintained throughout life of both.Now when this

###### When I was 32, my sister was half my age. Now I am 40 years old, how old is my sister?

Let's take your age as xx = 32And let's take your sisters' age as yShe was half your age so:y = 0,5 • x = 0,5 • 32 = 16Let's now decide the difference in age and call it n, out of this comes this formula:x - y = nTime to fill the formula in.32 - 16

###### When I was 32, my sister was half my age. Now my sister is 20 years old, how old am I?

As per statement when this person was 32 then his sister was half of his age, means her age was 32/2=16 yearsDifference in age between his sister and him32- 16=16Means this person is elder than his sister by 16 years.This age difference will be persistently maintained throughout life of

###### When I was 4 years old, my sister was twice my age. Now I am 32 years old, how old is my sister?

I don't know that you are male or female. Are you married?Your first problem is lack of confidence. Who told you who are good for nothing? it is not depend on others. Tell yourself I am good. God created me for him. So I will make him proud about me.Obesity is the main reason

###### When I was 8, my brother was 1/4 my age. Now my brother is 12, how old am I?

As per statement when this person was 8, then his brother was 1/4 of his age, means his brother must be 8 × 1/4=2 years of ageDifference in age between him and brother8–2 = 6 yearsMeans this person is older than his brother

###### When Julia was 10, Ben was twice of her age. Now Ben is 50, How old is Julia?

As per the statement when Julia was 10, then Ben was twice of her age, means Ben was10 × 2=20 yearsDifference in age between julia and Ben was20 - 10 = 10 yearsMeans Julia is younger to Ben by 10 yearsThis age difference will be maintained through our the life of both.Now Ben is 50 years old.

###### When my brother was 21, I was 1/3 of his age. Now that I am 21, how old is my brother?

As per statement when this person brother was 21 years old then he himself was 1/3 of his age, means his age was 21×1/3=7 yearsDifference in age between his brother and him21- 7=14 yearsMeans this person is younger than his

###### When my dad was 35 years old, I was just 14 years. Now his age is twice as old as my age. What is my present age?

Dear Quorans,Welcome!When your dad was 35, you was just 14.Your Age_ _Dad Age_____ 14 ___ ___ 35 _______ 15 ___ ___ 36 _______ 16 ___ ___ 37 _______ 17 ___ ___ 38 _______ 18 ___ ___ 39 _______ 19 ___ ___ 40 _______ 20 ___ ___ 41 _______ 21 ___ ___ 42

###### Which are the best brain foods for improving your math?

Maths has been my favourite subject ever since I started to get feel of my subjects.Now ,having scored 122/122 in jee advanced 2017 maths,I guess my opinion will be of help.So ,here comes the listInterestLovePassionPracticeMotivationGuidanceNote: You might get disappointed ,but trust me ,you can develop theseThe first three or the the last three can suffice.These are my own views

###### Why am I good at basic math but very bad at advanced math?

A lot of advanced math related to concepts and language.Try looking up Khan academy.It is a free online course with everything from basic education (like counting) to multivariate analysis and advanced calculus with electrical engineering.It has great practice options which

###### Why are so many brain pathways crossed, and when did decussation develop in phylogeny?

From what I've learned, nobody knows for sure (as is the case with many features of our anatomy and physiology).However, there is an explanation I've found to be compelling. Early, worm-like invertebrates -- our evolutionary ancestors -- may have relied

###### Why do Fitness Studio owners have such a hard time understanding the math around their business?

Fitness studio owners started their studio because they love fitness not because they are business people.The smartest move Soulcycle made was staying a Premium Service and saying no to classpass. I have run studios for years. Classpass does not work for studios. Your membership will leave

###### Why does math make my head / brain hurt?

Math takes concentration.1. In rats, concentration can deplete supplies of glucose to certain areas of the brain. No glucose means confusion, stress, fatigue, oxidative stress, cell death, etc... (study).2. Concentration can cause anxiety and anxiety is also associated with oxidative stress, which destroys

###### Working out: should I have an ab day or do ab exercises every day?

As world renown fitness trainer Tony Horton says, "You don't work other parts of your body every day, then you shouldn't work abs every day."Most workouts do engage your abs, however if you want to gain more strength and definition, you should work them every other day for a max of 15-20 minutes. The rest