Keystones — Cornerstone
Five GCSE retrieval questions · 11 July 2025 · mathsvault.uk/keystones
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1. Number
What is the missing number: 98 + ? = 163
Answer: 65 -
2. Algebra
Simplify: 6x + 3x
Answer: 9x -
3. Geometry
Opposite = 15cm, hypotenuse = 30cm. Find the angle
Answer: 30° (approximately) -
4. Ratio
Simplify: 12:18:15
Answer: 4:6:5 -
5. Statistics
Find the range of: 25, 15, 9, 13, 24
Answer: 16