**3 posts found**

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 |