![Xavi's T-shirt](/sites/default/files/styles/medium/public/thumbnails/content-id-15208-icon.png?itok=p09ReWyq)
Being resourceful
![Xavi's T-shirt](/sites/default/files/styles/medium/public/thumbnails/content-id-15208-icon.png?itok=p09ReWyq)
![Gabriel's Problem](/sites/default/files/styles/medium/public/thumbnails/content-id-11750-icon.jpg?itok=c8u3deFa)
problem
Gabriel's Problem
Gabriel multiplied together some numbers and then erased them. Can you figure out where each number was?
![Multiplication arithmagons](/sites/default/files/styles/medium/public/thumbnails/content-id-7447-icon.jpg?itok=Tu0QuZpK)
problem
Multiplication arithmagons
Can you find the values at the vertices when you know the values on the edges of these multiplication arithmagons?
![Reversals](/sites/default/files/styles/medium/public/thumbnails/content-id-11118-icon.png?itok=xcA6AvTn)
![Unequal Averages](/sites/default/files/styles/medium/public/thumbnails/content-id-11281-icon.png?itok=L9ubz1Li)
problem
Unequal Averages
Play around with sets of five numbers and see what you can discover about different types of average...
![Box plot match](/sites/default/files/styles/medium/public/thumbnails/content-id-11002-icon.png?itok=M3HX5Gr3)
![Wipeout](/sites/default/files/styles/medium/public/thumbnails/content-id-10996-icon.png?itok=j3fpxJ14)
problem
Wipeout
Can you do a little mathematical detective work to figure out which number has been wiped out?
![Forwards Add Backwards](/sites/default/files/styles/medium/public/thumbnails/content-id-11111-icon.png?itok=qNzPZE6G)
![Cryptarithms](/sites/default/files/styles/medium/public/thumbnails/content-id-11107-icon.jpg?itok=PZIqV5yE)
![Difference Sudoku](/sites/default/files/styles/medium/public/thumbnails/content-id-5798-icon.png?itok=OU8T32BN)