Copyright © University of Cambridge. All rights reserved.

4 star petrol at $s$ pence per litre costs 3 pence per litre more than unleaded. How many pence does it cost to buy $u$ litres of unleaded petrol?

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

*This problem is taken from the UKMT Mathematical Challenges.*

View the current weekly problem