How will you find out how much a tank of petrol costs?
Grandpa was measuring a rug using yards, feet and inches. Can you help William to work out its area?
Can you use this information to estimate how much the different fruit selections weigh in kilos and pounds?
My measurements have got all jumbled up! Swap them around and see if you can find a combination where every measurement is valid.
These Olympic quantities have been jumbled up! Can you put them back together again?
A security camera, taking pictures each half a second, films a cyclist going by. In the film, the cyclist appears to go forward while the wheels appear to go backwards. Why?