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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!

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Clock Hands

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

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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?

Millennium Man

Stage: 2 Challenge Level: Challenge Level:2 Challenge Level:2

Why do this problem?

This problem is a challenging one for children who are familiar with the measurement of time and calendars.

Key questions

How often do leap years occur?
What day of the week was the 1st January 2001 ... 1st January 2002 etc.?
What happens after $28$ years?