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### Number and algebra

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# Product of Fractions

Can you find an efficient way of calculating the product below, without using a calculator?

$$1\frac23\times1.8\times1\frac17\times1.75\times1\frac56$$

*This problem is taken from the World Mathematics Championships*

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### Consecutive Numbers

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Age 11 to 14

ShortChallenge Level

- Problem
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Can you find an efficient way of calculating the product below, without using a calculator?

$$1\frac23\times1.8\times1\frac17\times1.75\times1\frac56$$

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

An investigation involving adding and subtracting sets of consecutive numbers. Lots to find out, lots to explore.