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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.

11 votes

One number placed in 3 places makes these equations correct

The number is And as an extra challenge, I've placed it in exactly the same location for each equation!
David Robie's user avatar
9 votes
1 answer
629 views

Locked Door Number Puzzle

I'm supposed to make a delivery to a crazed botanist. In case you're curious, the shipping manifest is: Name: Canoga Weight: 9,723 g Ref #: 7943 Store Code: 6979 Price: 1,225 won Name: Khenaizi We …
David Robie's user avatar