Keystones — Cornerstone
Five GCSE retrieval questions · 9 April 2025 · mathsvault.uk/keystones
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1. Number
Calculate: 69 + 30
Answer: 69 + 30 = 99 -
2. Algebra
Factorise: 9x² + 9x
Answer: 9x(x + 1) -
3. Geometry
Opposite = 15cm, adjacent = 20cm. Calculate the angle
Answer: 36.9° -
4. Ratio
Calculate 50% of 184
Answer: 92 -
5. Statistics
Calculate the mean of: 20, 48, 45, 43, 6, 45, 30, 12
Answer: 31.1