Keystones — Cornerstone
Five GCSE retrieval questions · 24 July 2021 · mathsvault.uk/keystones
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1. Number
Calculate: 99 + 27
Answer: 99 + 27 = 126 -
2. Algebra
Solve: 9x - 11 = 2x + 10
Answer: x = 3 -
3. Geometry
Calculate the area of a right triangle with perpendicular sides 13cm and 12cm
Answer: 78cm² -
4. Ratio
Calculate 10% of 31
Answer: 3.1 -
5. Statistics
Find the range of: 9, 18, 9, 18, 24
Answer: 15