Keystones — Cornerstone
Five GCSE retrieval questions · 3 January 2025 · mathsvault.uk/keystones
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1. Number
Calculate: 445 + 127
Answer: 445 + 127 = 572 -
2. Algebra
Solve: x + 12 = 21
Answer: x = 9 -
3. Geometry
Opposite = 6cm, hypotenuse = 8.5cm. Find the angle
Answer: 45° (approximately) -
4. Ratio
Simplify: 20:8:8
Answer: 5:2:2 -
5. Statistics
Find the mean of: 16, 14, 11, 8, 4
Answer: 10.6