Toughnuts - Try These Unsolved Problems

Make Those Braceletslive

Age 7 to 11 Challenge Level:

Find all the ways of arranging the beads on this bracelet, using just two colours.

Different by One

Age 14 to 16 Challenge Level:

Can you make lines of Cuisenaire rods that differ by 1?

Standard Index Form Matching

Age 14 to 16 Challenge Level:

Can you match these calculations in Standard Index Form with their answers?