Use these four dominoes to make a square that has the same number of dots on each side.

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

On a digital 24 hour clock, at certain times, all the digits are consecutive. How many times like this are there between midnight and 7 a.m.?

This 100 square jigsaw is written in code. It starts with 1 and ends with 100. Can you build it up?

Use the 'double-3 down' dominoes to make a square so that each side has eight dots.

On a digital clock showing 24 hour time, over a whole day, how many times does a 5 appear? Is it the same number for a 12 hour clock over a whole day?

Choose the size of your pegboard and the shapes you can make. Can you work out the strategies needed to block your opponent?

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.