GOT IT! is an adding game for two. You can play against the computer or with a friend.

Start with the GOT IT! target 43.

The first player chooses a whole number from 1 to 7.

Players take turns to add a whole number from 1 to 7 to the running total.

The player who hits the target of 43 wins the game.

To change the game, choose a new GOT IT! target or a new range of numbers to add on.

Can you work out a winning strategy for any target and adding on any range of numbers?

Away from the computer: Challenge your friends. One of you names the target and range and lets the other player start. Are you good at mental arithmetic? Can you play without writing anything down?