Arrange the four number cards on the grid above to make a diagonal, vertical or horizontal line. You can put a number card on a square with

• the same number.
• a multiple of that number.
• a factor of that number.

How many ways can you do it?

This problem has been adapted from "Cards on the Table" by Fran Mosley, published by BEAM Education. To obtain a copy call the BEAM orderline on 020 7684 3330. (Price: £7.50 plus handling and delivery.)