Calendars were one of the earliest calculating devices developed by civilizations. Find out about the Mayan calendar in this article.
Read this article to find out the mathematical method for working out what day of the week each particular date fell on back as far as 1700.
A paradox is a statement that seems to be both untrue and true at the same time. This article looks at a few examples and challenges you to investigate them for yourself.
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
What can you say about when these pictures were taken?
Astronomy grew out of problems that the early civilisations had. They needed to solve problems relating to time and distance - both mathematical topics.
This article explains how Greenwich Mean Time was established and in fact, why Greenwich in London was chosen as the standard.
How far have these students walked by the time the teacher's car
reaches them after their bus broke down?
July 1st 2001 was on a Sunday. July 1st 2002 was on a Monday. When
did July 1st fall on a Monday again?
Follow the journey taken by this bird and let us know for how long
and in what direction it must fly to return to its starting point.
Nirmala and Riki live 9 kilometres away from the nearest market.
They both want to arrive at the market at exactly noon. What time
should each of them start riding their bikes?
Noticing the regular movement of the Sun and the stars has led to a desire to measure time. This article for teachers and learners looks at the history of man's need to measure things.
Alice's mum needs to go to each child's house just once and then
back home again. How many different routes are there? Use the
information to find out how long each road is on the route she
Not everybody agreed that the Third Millennium actually began on January 1st 2000. Find out why by reading this brief article.
How many of this company's coaches travelling in the opposite
direction does the 10 am coach from Alphaton pass before reaching
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
In this version of the story of the hare and the tortoise, the race
is 10 kilometres long. Can you work out how long the hare sleeps
for using the information given?
Use the information to work out the timetable for the three trains
travelling between City station and Farmland station.
These two challenges will test your time-keeping!
Can you put these mixed-up times in order? You could arrange them
in a circle.
This article for teachers suggests ways in which dinosaurs can be a
great context for discussing measurement.
Liitle Millennium Man was born on Saturday 1st January 2000 and he will retire on the first Saturday 1st January that occurs after his 60th birthday. How old will he be when he retires?
Chandrika was practising a long distance run. Can you work out how
long the race was from the information?
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?
These clocks have only one hand, but can you work out what time
they are showing from the information?
Describe what Emma might be doing from these pictures of clocks
which show important times in her day.
Try this version of Snap with a friend - do you know the order of
the days of the week?
Can you put these times on the clocks in order? You might like to arrange them in a circle.
A game for two or more players that uses a knowledge of measuring
tools. Spin the spinner and identify which jobs can be done with
the measuring tool shown.
If Tom wants to learn to cook his favourite supper, he needs to make a schedule so that everything is ready at the same time.
I found these clocks in the Arts Centre at the University of
Warwick intriguing - do they really need four clocks and what times
would be ambiguous with only two or three of them?
Can you rank these quantities in order? You may need to find out
extra information or perform some experiments to justify your
These pictures show some different activities that you may get up
to during a day. What order would you do them in?
Can you place these quantities in order from smallest to largest?
Read about the history behind April Fool's Day.
The pages of my calendar have got mixed up. Can you sort them out?
My cousin was 24 years old on Friday April 5th in 1974. On what day
of the week was she born?
Try this matching game which will help you recognise different ways of saying the same time interval.
Mathematics has allowed us now to measure lots of things about eclipses and so calculate exactly when they will happen, where they can be seen from, and what they will look like.
In this matching game, you have to decide how long different events take.
How many days are there between February 25th 2000 and March 11th?
This investigation explores using different shapes as the hands of
the clock. What things occur as the the hands move.
What is the date in February 2002 where the 8 digits are
palindromic if the date is written in the British way?
During the third hour after midnight the hands on a clock point in
the same direction (so one hand is over the top of the other). At
what time, to the nearest second, does this happen?
On a digital clock showing 24 hour time, over a whole day, how many
times does a 5 appear? Is it the same number for a 12 hour clock
over a whole day?
Can you create a story that would describe the movement of the man
shown on these graphs? Use the interactivity to try out our ideas.
Look at the changes in results on some of the athletics track events at the Olympic Games in 1908 and 1948. Compare the results for 2012.
These clocks have been reflected in a mirror. What times do they
On a digital 24 hour clock, at certain times, all the digits are
consecutive. How many times like this are there between midnight
and 7 a.m.?
Stuart's watch loses two minutes every hour. Adam's watch gains one
minute every hour. Use the information to work out what time (the
real time) they arrived at the airport.