GCSE · Ratio

Ratio problems where the amounts changeExam-style questions

How to handle ratios where quantities are added, removed or transferred by writing the parts as multiples of a common number and solving for it.

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18 questions · GCSE (Higher) level · mark scheme and worked solution on each · no sign-up to try

DifficultyAll Level 1 Level 2 Level 3 Level 4 Level 5

1
The ratio of adults to children at a swimming pool was $3 : 5$

Then $18$ more adults arrived. No one left.

The ratio of adults to children became $3 : 4$

Work out how many children were at the pool. (3 marks)
Level 3 · 3 marksTry it