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That's Mathematics!!!! - Mental maths#5

Haven't read that. Davi's book "Figuring - The Joy of Numbers" has a lot of great mental tricks


Sleepy_Gary
That's Mathematics!!!! - Riddle#3

Well done!


Sleepy_Gary
That's Mathematics!!!! - Riddle#1

Here's one I thought of. A square of nxn blocks, with a side n needs 2n+1 blocks to make another square with side n+1. How many blocks does a cube with side n need to be a cube with side n+1?


Sleepy_Gary
Reconnecting