Dmitry Kamenetsky

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All numbers in a 5x5 Minesweeper grid

combinatorics minesweeper asked Sep 16, 2019 at 3:37

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54 votes

A new way to cut a pizza

mathematics geometry tiling asked Oct 8, 2021 at 13:21

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44 votes

Controlling a robot blindfolded on a 9x9 grid

mathematics combinatorics asked Dec 2, 2019 at 4:08

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36 votes

First digit of 3^2020

mathematics no-computers number-theory asked Apr 15, 2020 at 11:37

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32 votes

100 prisoners and a secret number

mathematics strategy asked Jul 15, 2021 at 13:51

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31 votes

Sum of the first 86 square roots

mathematics calculation-puzzle no-computers asked Sep 5, 2021 at 0:11

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31 votes

2 vs. 1.005^200

mathematics no-computers asked Aug 18 at 11:17

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30 votes

A robot surviving on top of a 3x3 platform

mathematics combinatorics asked Nov 12, 2019 at 19:51

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29 votes

I can run, but I cannot walk - What am I?

riddle asked Jan 22, 2020 at 23:51

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29 votes

Creating the hardest 6x6 maze

logical-deduction combinatorics asked May 27, 2020 at 13:53

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Top Answers

Smallest PRIME containing the first 11 primes as sub-strings

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Longest known sequence of identical consecutive Collatz sequence lengths?

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Make 28 with the numbers 2020

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Princesses covering an 8x8 chess board

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Cover 63 squares of a chess board

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The Greenhouse Problem

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Numerical Boggle

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Which animal to breed to be a perfect assassin

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Chess Bloodshed

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Problems that feel exponential but are P

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Ten Pills in Ten Countries

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When you take away two

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How many fingers do the inhabitants of this planet have?

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How much money can we make?

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