Keystones — Cornerstone
Five GCSE retrieval questions · 2 May 2023 · mathsvault.uk/keystones
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1. Number
Calculate: 74 + 34
Answer: 74 + 34 = 108 -
2. Algebra
Solve: 9x = 135
Answer: x = 15 -
3. Geometry
Find the perimeter of a right triangle with sides 6cm and 8cm
Answer: 24cm -
4. Ratio
Simplify the ratio 12:21
Answer: 4:7 -
5. Statistics
Find the mean of: 15, 15, 3, 6, 16
Answer: 11