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rogerl

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58
There exists a power of 2 such that the last five digits are all 3's or 6's. Find the last 5 digits of this number
math.stackexchange.com

30
Does any given integer only occur in one primitive Pythagorean triple?
math.stackexchange.com

28
What evidence is there that Fermat had a proof for his Last Theorem?
hsm.stackexchange.com

23
What's the difference between a bijection and an isomorphism?
math.stackexchange.com

19
Why is every positive integer the sum of 3 triangular numbers?
math.stackexchange.com

18
Is there a way to make the tick marks larger?
mathematica.stackexchange.com

15
$ \tan 1^\circ \cdot \tan 2^\circ \cdot \tan 3^\circ \cdots \tan 89^\circ$
math.stackexchange.com

14
Generating functions and central binomial coefficient
math.stackexchange.com

13
A differentiation question conceptual query
math.stackexchange.com

12
If $p$ is prime, $p\ne3$ then $p^2+2$ is composite
math.stackexchange.com

12
Counterexamples to proofs of correct statements
math.stackexchange.com

12
How to draw the graph of this function? (very difficult)
math.stackexchange.com

11
Probability that a number is divisible by 11
math.stackexchange.com

11
Find a generator of the multiplicative group of $\mathbb{Z}/23\mathbb{Z}$ as a cyclic group
math.stackexchange.com

11
How do I prove that $x^p-x+a$ is irreducible in a field with $p$ elements when $a\neq 0$?
math.stackexchange.com

11
Show that the equation $x^{4} + rx + s = 0$ has at most two distinct real roots.
math.stackexchange.com

10
How To solve This Perfect Square Word Problem
math.stackexchange.com

10
Unusual result to the addition
math.stackexchange.com

10
How to prove $2\sin^2(80^\circ) - \sin(70^\circ)=1$?
math.stackexchange.com

9
Totient Function $\varphi{(x)}=24$
math.stackexchange.com

9
Methods for determining which roots of a polynomial are inside of the unit circle?
math.stackexchange.com

8
How to find all Pythagorean triples containing a given number?
math.stackexchange.com

8
What is the best way to solve an equation of the form $(f(x))^2-a(f(x))+b=x$?
math.stackexchange.com

8
Unconventional mathematics books
math.stackexchange.com

8
Proving $x^{2}+1 \neq n! $,using Gaussian Integer.
math.stackexchange.com

8
Prove that there is no number that divides both n and n+1
math.stackexchange.com

8
Polar form of a complex number
math.stackexchange.com

7
Proving Any connected subset of R is an Interval
math.stackexchange.com

7
Simplify the following complex fraction:
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7
Diagonalisation argument for real numbers
math.stackexchange.com

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