problem
Totality
Age
5 to 11
Challenge level
This is an adding game for two players. Can you be the first to reach the target?
problem
Strike it out
Age
5 to 11
Challenge level
Use your addition and subtraction skills, combined with some strategic thinking, to beat your partner at this game.
problem
Pairs of numbers
Age
5 to 7
Challenge level
If you have ten counters numbered 1 to 10, how many can you put into pairs that add to 10? Which ones do you have to leave out? Why?