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
A recipe for $4$ people uses $300$ g of flour. How much flour is needed for $6$ people?
Level 2 · 2 marksTry it
2
A bag contains red and blue marbles in the ratio $3 : 7$

There are $40$ marbles in the bag.

(a) How many more blue marbles than red marbles are there? (2 marks)

$5$ more red marbles are added to the bag.

(b) Write the new ratio of red to blue marbles in its simplest form. (1 mark)
Level 2 · 3 marksTry it