Time

problem
Decimal clock

Age

11 to 14

Challenge level

A decimal clock is started at midnight. What time would it show at 6 o'clock in the morning?
problem
Sweeping hands

Age

7 to 11

Challenge level

Use your knowledge of angles to work out how many degrees the hour and minute hands of a clock travel through in different amounts of time.
problem
Twizzle's journey

Age

5 to 7

Challenge level

Twizzle, a female giraffe, needs transporting to another zoo. Which route will give the fastest journey?
problem
Three of a kind

Age

11 to 14

Challenge level

How long is it between 5:55 and the next time all three digits on a digital clock are the same?
problem
Out of sync

Age

11 to 14

Challenge level

Albert Einstein could see two clocks which were out of sync. For what fraction of the day did they show the same time?
problem
Millennium leap

Age

11 to 14

Challenge level

How many leap years will there be between 2001 and 3001?
problem
Circuit training

Age

14 to 16

Challenge level

Mike and Monisha meet at the race track, which is 400m round. Just to make a point, Mike runs anticlockwise whilst Monisha runs clockwise. Where will they meet on their way around and will they ever meet at the start again? If so, after how many circuits?
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
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
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?