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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?


Stage: 2 Short Challenge Level: Challenge Level:2 Challenge Level:2
It might help to have a clock and a calendar to look at while you're working on these problems.
What could you jot down or draw to help you?
What will Tom's watch say when the time is 7.57?
What will John's watch say when the time is 7.57?