User Henry - Mathematics Stack Exchange

149 votes

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Incremental averaging

answered Feb 7, 2012 at 16:54

114 votes

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Fastest way to check if $x^y > y^x$?

answered Oct 7, 2013 at 10:56

81 votes

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What is Trinity Hall Prime number?

answered Sep 7, 2017 at 17:38

81 votes

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Underlying Reason For Taking Log Base 10

answered Feb 22, 2018 at 8:35

46 votes

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Conditional and joint probability manipulations when there are 3 variables

answered Jul 28, 2012 at 23:49

45 votes

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Prove that $n! > \sqrt{n^n}, n \geq 3$

answered Feb 5, 2012 at 22:45

43 votes

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birthday problem - expected number of collisions

answered Apr 29, 2011 at 9:09

43 votes

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$f : [0,\infty) → \mathbb{R}$ with $f(0) = f'(0) = 0$ and $f(x) < x^2$ and $f',f'',f''' > 0$?

answered Jan 17, 2019 at 18:32

39 votes

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Expected Value of Random Walk

answered Jan 28, 2012 at 2:18

36 votes

Does strict convexity imply differentiability?

answered Sep 27, 2011 at 6:38

36 votes

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Square roots -- positive and negative

answered Mar 11, 2011 at 10:46

34 votes

How to get the shaded region of the rectangle?

answered Jul 22, 2018 at 23:16

33 votes

Visually deceptive "proofs" which are mathematically wrong

answered Apr 7, 2014 at 23:49

32 votes

Why are fractions the same as divisions?

answered Mar 24, 2018 at 15:48

31 votes

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Can a right triangle have odd-length legs and even-length hypotenuse?

answered Nov 29, 2016 at 15:12

31 votes

What does it mean to not be able to take the derivative of a function multiple times?

answered Jun 18, 2019 at 7:39

30 votes

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Why is my intuition wrong that one of two archers win in a tournament?

answered Jan 11, 2016 at 16:58

29 votes

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Asymptotic formula for ratio of double factorials

answered Oct 18, 2023 at 13:59

29 votes

What does it mean when proof by contradiction doesn't lead to a contradiction?

answered Sep 13, 2018 at 16:21

28 votes

The locus of the intersection point of two perpendicular tangents to a given ellipse

answered Apr 17, 2011 at 21:50

28 votes

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A fair coin is tossed $n$ times by two people. What is the probability that they get same number of heads?

answered Nov 18, 2011 at 21:58

28 votes

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Keep the value of an 8-sided die roll, or gamble by taking a 12-sided die roll. What's the best strategy?

answered Sep 14, 2012 at 14:19

27 votes

Accepted

The expectation of absolute value of random variables

answered Nov 7, 2013 at 19:31

27 votes

The math behind Warren Buffett's famous rule – never lose money

answered Dec 7, 2018 at 18:15

26 votes

Is Lewis Carroll's reasoning correct?

answered Mar 17, 2014 at 7:18

25 votes

Collatz Conjecture exclusivity

answered Aug 1, 2011 at 22:13

24 votes

Accepted

Meaning of coprime = (relatively) prime = mutually prime

answered Sep 12, 2011 at 22:13

24 votes

Active learning vs Passive learning in Math

answered Feb 15, 2014 at 22:07

22 votes

A lady and a monster

answered Apr 5, 2011 at 17:08

22 votes

How to prove a formula for the sum of powers of $2$ by induction?

answered Feb 18, 2011 at 0:44

Stack Exchange Network

5,854 Answers

Incremental averaging

Fastest way to check if $x^y > y^x$?

What is Trinity Hall Prime number?

Underlying Reason For Taking Log Base 10

Conditional and joint probability manipulations when there are 3 variables

Prove that $n! > \sqrt{n^n}, n \geq 3$

birthday problem - expected number of collisions

$f : [0,\infty) → \mathbb{R}$ with $f(0) = f'(0) = 0$ and $f(x) < x^2$ and $f',f'',f''' > 0$?

Expected Value of Random Walk

Does strict convexity imply differentiability?

Square roots -- positive and negative

How to get the shaded region of the rectangle?

Visually deceptive "proofs" which are mathematically wrong

Why are fractions the same as divisions?

Can a right triangle have odd-length legs and even-length hypotenuse?

What does it mean to not be able to take the derivative of a function multiple times?

Why is my intuition wrong that one of two archers win in a tournament?

Asymptotic formula for ratio of double factorials

What does it mean when proof by contradiction doesn't lead to a contradiction?

The locus of the intersection point of two perpendicular tangents to a given ellipse

A fair coin is tossed $n$ times by two people. What is the probability that they get same number of heads?

Keep the value of an 8-sided die roll, or gamble by taking a 12-sided die roll. What's the best strategy?

The expectation of absolute value of random variables

The math behind Warren Buffett's famous rule – never lose money

Is Lewis Carroll's reasoning correct?

Collatz Conjecture exclusivity

Meaning of coprime = (relatively) prime = mutually prime

Active learning vs Passive learning in Math

A lady and a monster

How to prove a formula for the sum of powers of $2$ by induction?