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Questions tagged [mathematics]

A puzzle strongly related to mathematical facts and objects, or whose solution needs serious mathematical arguments. General mathematics questions are off-topic but can be asked on Mathematics Stack Exchange.

5
votes
3answers
405 views

My Grandpa's Box #1

My grandpa died last month. At the reading of his will, he left me a strange wooden box. A post-it-note on the side read "You were always good at puzzles." There was a number lock on the front that ...
7
votes
1answer
447 views

Weird and complex puzzle that we need help with

So basically this is a complex deep web puzzle and we're pretty much stuck at it right now as we don't have any idea what this is about, any help will be aprreciated (the attached images are the ...
1
vote
1answer
216 views

Master and Slave versus Bob: hard version

Continuation of: "Sub-puzzle: Master and Slave versus Bob the Violent but Honest Psychopath" and "Master and Slave versus Bob: easy version" The hard version is identical to the easy version (see ...
9
votes
0answers
218 views

Peaceful Encampments

This math puzzle is due to Donald Knuth (as far as I know; maybe he got it from someone else) circa 2014. Consider a plain represented by the unit square. On this plain we want to “peacefully ...
9
votes
0answers
180 views

A small team doing their job

Find the unique solution to $$ 5\,ninja + retook + quarter + turn = \_\,\_\,\_\,\_ + \_\,\_\,\_\,\_\,\_\,\_\,\_\,\_\,\_\,\_ $$ where each unknown is a different _ _ _&#...
6
votes
0answers
797 views
4
votes
0answers
191 views

Which Number Replaces the Question Mark?

Can you find out what the numbers below have in common? Can you figure out what comes next? ...
-4
votes
0answers
113 views

Numerical sequence

That's my last post for the week, I need help in solving this numerical sequence: ?, 36, 36, 18, 16, 14, ? I don't see any correlation between these numbers. Source:http://zagaza.ru/za548.htm ...
-4
votes
0answers
105 views

mathemathical-logical sequence solving

I need help in solving this sequence: 24, 333333, ?, ?, 53, 44444444, 82, ?, ?, 222244444444, ?, ?, ?, 444433333322221 reposting this because I wanted to add more informations. Now by taking a look ...