List

Clocks and watches

problem

How many times?

Age
7 to 11
Challenge level
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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.?

problem

Clocks

Age
7 to 11
Challenge level
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These clocks have been reflected in a mirror. What times do they say?

problem

A mixed-up clock

Age
7 to 11
Challenge level
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There is a clock-face where the numbers have become all mixed up. Can you find out where all the numbers have got to from these ten statements?

problem

Wonky watches

Age
7 to 11
Challenge level
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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.

Two Clocks
problem

Two clocks

Age
7 to 11
Challenge level
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These clocks have only one hand, but can you work out what time they are showing from the information?

The time is ...
problem

The time is ...

Age
7 to 11
Challenge level
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Can you put these mixed-up times in order? You could arrange them in a circle.

problem

Watch the clock

Age
7 to 11
Challenge level
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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?

5 on the clock
problem

5 on the clock

Age
7 to 11
Challenge level
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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?