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57 votes

How to treat differentials and infinitesimals?

calculus asked Jan 9 '14 at 0:27
physics.stackexchange.com

54 votes

Have there been any updates on Mochizuki's proposed proof of the abc conjecture?

ag.algebraic-geometry nt.number-theory arithmetic-geometry abc-conjecture asked Feb 25 '16 at 4:53
mathoverflow.net

42 votes

In the past did Martin Shkreli offer free medication for those who could not afford it?

medications pharmaceutical asked Jul 19 '18 at 7:08
skeptics.stackexchange.com

42 votes

“Classroom” math?

soft-question problem-solving asked Mar 3 '17 at 15:03
math.stackexchange.com

36 votes

How can I answer this Putnam question more rigorously?

calculus proof-writing contest-math asked Jul 28 '16 at 17:57
math.stackexchange.com

36 votes

Why does Cersei need to repay the Iron Bank right now?

plot-explanation game-of-thrones asked Aug 10 '17 at 15:23
movies.stackexchange.com

34 votes

What is the equation for a 3D line?

geometry 3d solid-geometry asked May 28 '13 at 3:34
math.stackexchange.com

33 votes

Could we reach the earth's core using today's nuclear arsenal?

science-based reality-check earth geology nuclear asked Jul 4 '16 at 16:26
worldbuilding.stackexchange.com

32 votes

What explains Jaime and Bronn's fate after the supply chain battle?

plot-explanation game-of-thrones asked Aug 14 '17 at 4:45
movies.stackexchange.com

32 votes

Is diamond armor better than traditional armor?

science-based medieval medieval-europe materials armors asked Apr 22 '16 at 15:59
worldbuilding.stackexchange.com

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Top Answers
53
Prove that $\sqrt 2 + \sqrt 3$ is irrational
math.stackexchange.com

31
Why can't you flatten a sphere?
math.stackexchange.com

21
How to introduce my perpetual motion invention to the scientific community?
worldbuilding.stackexchange.com

19
How can I calculate the number of perfect cubes among the first $4000$ positive integers?
math.stackexchange.com

17
The pigeonhole principle(?)
math.stackexchange.com

15
Why is the Absolute value / modulus function used?
math.stackexchange.com

12
How to find the mod of this large number
math.stackexchange.com

11
What are the coordinates of red point?
math.stackexchange.com

11
Find coefficients of polynomial, knowing its roots are consecutive integers
math.stackexchange.com

10
What exactly is circular reasoning?
math.stackexchange.com

10
Is it feasible to have a nomadic space civilization?
worldbuilding.stackexchange.com

9
Can a subsequence repeat a term finitely many times?
math.stackexchange.com

7
Question about the chain rule.
math.stackexchange.com

7
Is moving faster than light speed a paradox?
worldbuilding.stackexchange.com

7
Logarithmic equation proof
math.stackexchange.com

7
why $ 1 - \cos^2x = \sin^2x $?
math.stackexchange.com

6
The probability of scoring a 2 just once when a die is thrown three times?
math.stackexchange.com

6
Non-trivial Polynomial Solution to $P(x)=(P'(x))^2, P(2)=0$?
math.stackexchange.com

6
Is $\sqrt{-(x^2)}$ discontinous on the reals?
math.stackexchange.com

5
Give an example of a group G and elements a , b ∈ G such that a^{-1}(ba) ≠ b.
math.stackexchange.com

5
Inequalities Proof
math.stackexchange.com

5
My star will explode as a supernova. What can I do in order to ensure that my planet survives that?
worldbuilding.stackexchange.com

5
Given any seven real numbers, prove that $0 \le \frac{x-y}{1+xy} \le \frac{1}{\sqrt3}$ holds for at least two?
math.stackexchange.com

5
How do I integrate $\int\dfrac{e^x - e^{-x}}{e^x + e^{-x}}\,dx$?
math.stackexchange.com

5
Finding Polynomial Equations for $1^4 + 2^4 + 3^4 + \ldots n^4$
math.stackexchange.com

5
Convergence of $ \sum_{k=1}^{\infty} \frac {3^k}{5^k + 1}$
math.stackexchange.com

5
Adding $k^2$ to $1^2 + 2^2 + \cdots + (k - 1)^2$.
math.stackexchange.com

5
How to show $e^x$ and $\ln x$ do not intersect?
math.stackexchange.com

5
Prove: $\log_2(x)+\log_x(y)+\log_y(8)\geq \sqrt[3]{81}$
math.stackexchange.com