Stick some cubes together to make a cuboid. Find two of the angles by as many different methods as you can devise.
Can you find the distance from the well to the fourth corner, given the distance from the well to the first three corners?
15 = 7 + 8 and 10 = 1 + 2 + 3 + 4. Can you say which numbers can be expressed as the sum of two or more consecutive integers?
In this game the winner is the first to complete a row of three. Are some squares easier to land on than others?
The numbers 2 to 8 are to be placed in the diagram so that the row and column each adds to 21. Which numbers can replace x?
Investigate the totals you get when adding numbers in threes on the diagonal of this pattern.
Find at least one way to put in some operation signs to make these digits come to 100.
