Keystones — Cornerstone
Five GCSE retrieval questions · 28 July 2025 · mathsvault.uk/keystones
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1. Number
Calculate: 99 + 79
Answer: 99 + 79 = 178 -
2. Algebra
Simplify: 6x + 3x
Answer: 9x -
3. Geometry
Opposite = 15cm, adjacent = 12cm. Calculate the angle
Answer: 51.3° -
4. Ratio
Find 83% of 454
Answer: 376.82 -
5. Statistics
Calculate the mean of: 7, 30, 25, 43, 17, 44
Answer: 27.7