Challenge Level

Use these head, body and leg pieces to make Robot Monsters which are different heights.

Challenge Level

Place the numbers 1 to 6 in the circles so that each number is the difference between the two numbers just below it.

Challenge Level

There are six numbers written in five different scripts. Can you sort out which is which?

Challenge Level

Can you go through this maze so that the numbers you pass add to exactly 100?

Challenge Level

Choose four different digits from 1-9 and put one in each box so that the resulting four two-digit numbers add to a total of 100.

Challenge Level

Arrange the four number cards on the grid, according to the rules, to make a diagonal, vertical or horizontal line.

Challenge Level

A game for two people, or play online. Given a target number, say 23, and a range of numbers to choose from, say 1-4, players take it in turns to add to the running total to hit their target.

Challenge Level

Four bags contain a large number of 1s, 3s, 5s and 7s. Pick any ten numbers from the bags above so that their total is 37.

Challenge Level

A game in which players take it in turns to choose a number. Can you block your opponent?