Mathematics
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timon92
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View all questions and answers
All Questions Answers
Score Newest
answer
19
Solutions to $a,\ b,\ c,\ \frac{a}{b}+\frac{b}{c}+\frac{c}{a},\ \frac{b}{a} + \frac{c}{b} + \frac{a}{c} \in \mathbb{Z}$
Dec 10, 2018
question
15
A circle tangent to an ellipse
Jul 15, 2017
answer
12
Let $S(n)$ be the sum of the digits of a number $n$. Solve $n+S(n)+S(S(n))=1993$
Mar 21, 2015
answer
12
If two sets $A$ and $B$ have equal power sets, can we conclude that $A=B$?
Oct 7, 2015
answer
11
A Pigeonhole-Principle from IMO Shortlist.
Nov 6, 2017
answer
11
How to prove :$\sqrt{1!\sqrt{2!\sqrt{3!\sqrt{\cdots\sqrt{n!}}}}} <3$
Jan 5, 2018
answer
11
If $AB\parallel DC$, $BC\parallel AD$, and $AC\parallel DQ$, find $\Bbb X$ in terms of the areas $\Bbb A$, $\Bbb B$, and $\Bbb C$.
Apr 28, 2020
answer
10
An angle inside a regular pentagon
Feb 9, 2020
answer
10
Find the missing angle in triangle
Jan 8, 2021
answer
10
Japanese theorem for cyclic quadrilaterals Proof Inversion
Mar 23, 2021

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