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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!
Clock Hands
This investigation explores using different shapes as the hands of the clock. What things occur as the the hands move.
Ten Green Bottles
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?
Age 7 to 11
Challenge Level
Do you know those calendars that are a series of cards, one for each month?
I have one of those on my desk at home.
The cat jumped on my desk while I was at school yesterday and knocked it off on to the floor.
Now they are all muddled up.
I do not know which month is which and I don't know how to put them back in the right order.
Can you help?
Here is a sheet you can print off and cut up into twelve cards, one for each month. Or you could use the interactivity below which allows you to drag the month cards so you can try out your ideas.
Can you put the cards in the right order?
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NRICH is part of the family of activities in the Millennium Mathematics Project.
NRICH is part of the family of activities in the Millennium Mathematics Project.