### Consecutive Numbers

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

### Have You Got It?

Can you explain the strategy for winning this game with any target?

### Pair Sums

Five numbers added together in pairs produce: 0, 2, 4, 4, 6, 8, 9, 11, 13, 15 What are the five numbers?

# Product of Fractions

##### Age 11 to 14 Short Challenge Level:

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