Questions tagged [mathematics]
A puzzle related to mathematical facts and objects, whose solution needs mathematical arguments. General mathematics questions are off-topic but can be asked on Mathematics Stack Exchange.
7 questions from the last 7 days
17
votes
2
answers
698
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Cover a cube with hugs and kisses!
The following set of eight shapes (which sort of looks like XOXOXOXO if you squint with your brain a little):
... can all be folded onto the surface of a single cube in a way that covers the entire ...
- 6,361
10
votes
3
answers
2k
views
Are you ready to Mingle?
Mingle is a game played in the television series Squid Game. 100 players enter the game arena. The game runs for 2 rounds. During each round r, the game host selects a number Nr, where 2 ≤ Nr ≤ 100. ...
- 40.1k
16
votes
3
answers
687
views
20 people where each person bears a grudge against exactly one other person in the group
Here's a problem I recently saw (not my own):
In a group of 20 people, each person bears a grudge against exactly one other person in the group. No matter how these grudges are arranged (multiple ...
- 55.7k
6
votes
2
answers
647
views
Making an expression with the numbers 1 to 20, odd or even
The numbers 1 through 20 are written in a row. Two players take turns putting plus signs and minus signs in front of each number. So, a total of 20 signs are to be put in front of the numbers.
When ...
- 8,333
6
votes
2
answers
178
views
How many guesses do you need at most to solve Mastermind variants?
My father likes to tell a story about how he broke the system for a game event his school held. Specifically, he figured out a way to always at least break even on the Mastermind-like game, which ...
- 14.4k
-2
votes
1
answer
82
views
Make the number 49 with the digits 2, 0, 2, 6
0 can be either used as a 0 or a 1 with the symbol 0! I got this sheet at school from my teacher. You can use brackets, subtraction, multiplication, division, and addition
using the digits in 2026 as ...
- 17
-4
votes
3
answers
110
views
Make the numbers 45, 44, 43, 42, 41, and 40 out of the numbers 2 0/0! 2 6
0 can be either used as a 0 or a 1 with the symbol 0!. You can use concatenation, brackets, subtraction, multiplication, division, and addition. I got this sheet at school from my teacher.
using the ...
- 17