Keystones — Cornerstone
Five GCSE retrieval questions · 10 March 2026 · mathsvault.uk/keystones
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1. Number
Calculate: 8 × 11
Answer: 8 × 11 = 88 -
2. Algebra
Expand: 8(x + 7)
Answer: 8x + 56 -
3. Geometry
Calculate the perimeter of a right triangle with sides 9cm and 6cm
Answer: 25.8cm -
4. Ratio
Find 58% of 225
Answer: 130.5 -
5. Statistics
Calculate the range of: 68, 94, 34, 89, 107, 86
Answer: 73