You may also like

problem icon

What Number?

I am less than 25. My ones digit is twice my tens digit. My digits add up to an even number.

problem icon

Odd Tic Tac

An odd version of tic tac toe

problem icon

Break it Up!

In how many different ways can you break up a stick of 7 interlocking cubes? Now try with a stick of 8 cubes and a stick of 6 cubes.

Grouping Goodies

Stage: 1 Challenge Level: Challenge Level:3 Challenge Level:3 Challenge Level:3

How could you group twenty sweets into fives?
How many sweets would you have had altogether if there were two left over after each of these groupings?