Mathematics
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SonodaUmi's user avatar
SonodaUmi's user avatar
SonodaUmi
  • Member for 7 years
  • Last seen more than 2 years ago
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All Questions Answers
Score Newest
question
11
In a club with 99 people, everyone knows at least 67 people. Prove there's a group of 4 people where everyone knows each other
Oct 26, 2019
question
6
Finding the sum of digits of $9 \cdot 99 \cdot 9999 \cdot ... \cdot (10^{2^n}-1)$
Jun 11, 2017
question
4
Is it possible to have $2^{2015}$ balls in a box according to these rules?
Dec 7, 2016
question
4
Find an angle $A$ such that $\tan A + \cot A = 2$
Sep 20, 2018
question
3
Not being together arrangement exercise
Nov 21, 2016
question
3
How many triangles exist in the diagonals intersections of an heptagon?
Apr 17, 2017
question
3
Find all the integers $n$ such that $n + 2112$ and $4n + 2112$ are square numbers
Aug 18, 2017
question
3
Find all primes $(p,q)$ such that $p|q+6$ and $q|p+7$
Jun 30, 2019
question
2
How many ways exist to get from $A$ with the following conditions in the image?
Mar 10, 2017
question
2
What is the least amount of pieces on a board with the following conditions:
Aug 20, 2018

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