Keystones — Lintel

Five GCSE retrieval questions · 22 August 2023 · mathsvault.uk/keystones

1. Number

Simplify: y² × y³ × y⁴

Answer: y⁹
2. Algebra

Factorise fully: 28x² + 24x

Answer: 4x(7x + 6)
3. Geometry

Find c if a = 8cm and b = 13cm in a right triangle

Answer: 15.3cm
4. Ratio

Simplify the ratio 4m:400cm

Answer: 1:100
5. Statistics

Find the range of: -8, -12, 17, 47, 36

Answer: 59

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