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Which times on a digital clock have a line of symmetry? Which look the same upside-down? You might like to try this investigation and find out!

Transformation Tease

What are the coordinates of this shape after it has been transformed in the ways described? Compare these with the original coordinates. What do you notice about the numbers?

Penta Play

A shape and space game for 2, 3 or 4 players. Be the last person to be able to place a pentomino piece on the playing board.


Age 7 to 11
Challenge Level

We had a lot of emails about this problem. You had to think very carefully in order to work out the times on the clock faces. Well done to Ben from St Michael's School who who sent in a completely correct solution. He said:

Red clock: 10.45
Blue clock: 7.15
Yellow clock: 5.35
Green clock: 7.49

The last one was particularly difficult and Ben explained that he looked upsidedown to find the answer!