Keystones — Capstone
Five GCSE retrieval questions · 13 May 2021 · mathsvault.uk/keystones
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1. Number
Simplify: y2 × y4 × y3
Answer: y9 -
2. Algebra
Solve: x⁄8 = 2.5
Answer: x = 20 -
3. Geometry
Adjacent = 20cm, hypotenuse = 37cm. Find the angle
Answer: 57.3° -
4. Ratio
Simplify the ratio 4m:400cm
Answer: 1:100 -
5. Statistics
The mean of 5 numbers is 20. If 4 of them are 18, 43, 30, 48, what is the missing number?
Answer: -39