Watch the Clock
Age 7 to 11
Challenge Level
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?
How Many Times?
Age 7 to 11
Challenge Level
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.?
Wonky Watches
Age 7 to 11
Challenge Level
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.
Clocks
Age 7 to 11
Challenge Level
These clocks have been reflected in a mirror. What times do they say?
The Time Is ...
Age 7 to 11
Challenge Level
Can you put these mixed-up times in order? You could arrange them in a circle.
5 on the Clock
Age 7 to 11
Challenge Level
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?
Two Clockslive
Age 7 to 11
Challenge Level
These clocks have only one hand, but can you work out what time they are showing from the information?
Approaching Midnightlive
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?
You may also be interested in this collection of activities from the STEM Learning website, that complement the NRICH activities above.
NRICH is part of the family of activities in the Millennium Mathematics Project.