Time

list
Approaching midnight

Age

7 to 14

Here's a strategy game with lots to explore. Can you find out enough to guarantee a win, no matter what the settings?
problem
Walk and ride

Age

7 to 14

Challenge level

How far have these students walked by the time the teacher's car reaches them after their bus broke down?
problem
Place your orders

Age

11 to 14

Challenge level

Can you rank these sets of quantities in order, from smallest to largest? Can you provide convincing evidence for your rankings?
problem
Buses

Age

11 to 14

Challenge level

A bus route has a total duration of 40 minutes. Every 10 minutes, two buses set out, one from each end. How many buses will one bus meet on its way from one end to the other end?
problem
An unhappy end

Age

11 to 14

Challenge level

Two engines, at opposite ends of a single track railway line, set off towards one another just as a fly, sitting on the front of one of the engines, sets off flying along the railway line...
problem
All in a jumble

Age

11 to 14

Challenge level

My measurements have got all jumbled up! Swap them around and see if you can find a combination where every measurement is valid.
problem
Thousands and millions

Age

11 to 14

Challenge level

Here's a chance to work with large numbers...
problem
N is a number

Age

11 to 14

Challenge level

N people visit their friends staying N kilometres along the coast. Some walk along the cliff path at N km an hour, the rest go by car. How long is the road?
problem
A problem of time

Age

14 to 16

Challenge level

Consider a watch face which has identical hands and identical marks for the hours. It is opposite to a mirror. When is the time as read direct and in the mirror exactly the same between 6 and 7?
problem
Take a message soldier

Age

14 to 18

Challenge level

A messenger runs from the rear to the head of a marching column and back. When he gets back, the rear is where the head was when he set off. What is the ratio of his speed to that of the column?