Keystones — Bedrock

Five GCSE retrieval questions · 15 March 2022 · mathsvault.uk/keystones

1. Number

Simplify: 5² × 5²

Answer: 5⁴
2. Algebra

Factorise: 21x + 24

Answer: 3(7x + 8)
3. Geometry

Convert 4kg to g

Answer: 4000g
4. Ratio

Simplify the ratio 20:10

Answer: 2:1
5. Statistics

What is the probability of getting heads when flipping a fair coin?

Answer: ¹⁄₂

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