Keystones — Cornerstone
Five GCSE retrieval questions · 12 March 2025 · mathsvault.uk/keystones
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1. Number
What is the missing number: 85 + ? = 113
Answer: 28 -
2. Algebra
Collect like terms: 5x + 7y + 3x + 7y
Answer: 8x + 14y -
3. Geometry
Opposite = 9cm, hypotenuse = 12.7cm. Find the angle
Answer: 45° (approximately) -
4. Ratio
Simplify the ratio 30:35
Answer: 6:7 -
5. Statistics
Calculate the range of: 59, 49, 66, 67, 67, 35
Answer: 32