You may also like

Consecutive Numbers

An investigation involving adding and subtracting sets of consecutive numbers. Lots to find out, lots to explore.

Calendar Capers

Choose any three by three square of dates on a calendar page...

Building Tetrahedra

Can you make a tetrahedron whose faces all have the same perimeter?

Funny Factorisation

Age 11 to 16 Challenge Level:

This printable worksheet may be useful: Funny Factorisation.

Missing Multipliers might be a good problem to try before looking at this one.