### Consecutive Numbers

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

### Calendar Capers

Choose any three by three square of dates on a calendar page...

### Latin Numbers

Can you create a Latin Square from multiples of a six digit number?

# Sideways Ratio

##### Stage: 3 Short Challenge Level:

A rectangle with area $125\;\mathrm{cm}^2$ has sides in the ratio $4:5$.

What is the perimeter of the rectangle?

If you liked this problem, here is an NRICH task that challenges you to use similar mathematical ideas.

This problem is taken from the UKMT Mathematical Challenges.
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