Flapjack
A recipe for flapjacks calls for a certain quantity of butter, sugar and oats. Given the amount of these ingredients I have, how many flapjacks can I make?
Age
11 to 14
Challenge level
Problem
A recipe for eight flapjacks needs 2oz butter, 3oz sugar and 4oz rolled oats.
How many flapjacks can I make if I have 14oz butter, 15oz sugar and 16oz rolled oats?
If you liked this problem, here is an NRICH task which challenges you to use similar mathematical ideas.
Student Solutions
Answer: 32
8 flapjacks: We have:
2 oz butter 14 oz butter ($\times$7)
3 oz sugar 15 oz sugar ($\times$5)
4 oz rolled oats 16 oz rolled oats ($\times$4)
8$\times$4 = 32 (and there will be some butter and sugar left over).