Keystones — Cornerstone
Five GCSE retrieval questions · 14 August 2021 · mathsvault.uk/keystones
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1. Number
Find the total of 260, 180, and 81
Answer: 521 -
2. Algebra
Solve: 9x + 10 = 8x + 20
Answer: x = 10 -
3. Geometry
Calculate the area of a right triangle with perpendicular sides 11cm and 15cm
Answer: 82.5cm² -
4. Ratio
Simplify: 20:12:8
Answer: 5:3:2 -
5. Statistics
Calculate the range of: 82, 52, 30, 60, 50, 89
Answer: 59