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Inclusion Exclusion

How many integers between 1 and 1200 are NOT multiples of any of the numbers 2, 3 or 5?

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Takeaway Time

Pizza, Indian or Chinese takeaway? If everyone liked at least one, how many only liked Indian?

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How many dry days did Aisha have on her holiday?

One or Both

Age 11 to 14 Short Challenge Level:

You can find more short problems, arranged by curriculum topic, in our short problems collection.