Time

problem
Digital times

Age

11 to 14

Challenge level

Which segment on a digital clock is lit most each day? Which segment is lit least? Does it make any difference if it is set to 12 hours or 24 hours?
problem
Rule of three

Age

11 to 14

Challenge level

If it takes four men one day to build a wall, how long does it take 60,000 men to build a similar wall?
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
Speedy Sidney

Age

11 to 14

Challenge level

Two trains set off at the same time from each end of a single straight railway line. A very fast bee starts off in front of the first train and flies continuously back and forth between the two trains. How far does Sidney fly before he is squashed between the two trains?
problem
Ten green bottles

Age

7 to 11

Challenge level

Do you know the rhyme about ten green bottles hanging on a wall? If the first bottle fell at ten past five and the others fell down at 5 minute intervals, what time would the last bottle fall down?
problem
How many days?

Age

5 to 7

Challenge level

How many days are there between February 25th 2000 and March 11th?
problem
Clock hands

Age

7 to 11

Challenge level

This investigation explores using different shapes as the hands of the clock. What things occur as the the hands move.
problem
Times

Age

7 to 11

Challenge level

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!
page
Time and tide

What can you say about when these pictures were taken?
page
Making maths: make a pendulum

Galileo, a famous inventor who lived about 400 years ago, came up with an idea similar to this for making a time measuring instrument. Can you turn your pendulum into an accurate minute timer?