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ralphmerridew
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38
Matchstick rearrangement: Zero to Hero
Aug 20, 2020
36
The Devil's Shell Game
Feb 20, 2024
34
Can a number have the same digit sum and digit product?
Dec 1, 2025
26
A prime number in a sequence with number 1001
Dec 19, 2024
24
The answer is stranger than you think
Nov 15, 2021
20
Building equilateral triangles by reflecting tokens
Nov 19, 2021
20
Is 1,111,111,111,111,111,111 prime?
Oct 23, 2025
18
I can't count on my coworkers
Dec 12, 2024
18
Guess color of your hat cooperatively, goal is all correct or all incorrect
Mar 3, 2024
17
What is so unique about these numbers?
Dec 27, 2017

Top network posts

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15
Having a regular $24$ sided die how can a professor fairly select a student to be questioned in a class of $26?$
12
Is every positive integer a sum of at most 4 distinct quarter-squares?
6
Why do you say "air conditioned" and not "conditioned air"?
6
Could you generate any positive number given only a few specific operators and operands?
5
Are all continuous one one functions differentiable?