Aim of game:
To find a line of four numbers that total of 15 or 20.
- Each card features a 10 by 10 grid of numbers. Each board features 12 or 14 such strings of numbers. The lines which total 20 only run horizontally or vertically, and all of the numbers have been chosen with care.
- The children have to find a line of four numbers that total 20.
- The sheets could also be used as a homework activity.