Keystones — Cornerstone
Five GCSE retrieval questions · 11 September 2023 · mathsvault.uk/keystones
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1. Number
What is the missing number: 55 + ? = 160
Answer: 105 -
2. Algebra
Simplify: 3x + 7x
Answer: 10x -
3. Geometry
Opposite = 6cm, hypotenuse = 12cm. Find the angle
Answer: 30° (approximately) -
4. Ratio
Calculate 10% of 144
Answer: 14.4 -
5. Statistics
Find the mean of: 14, 11, 14, 11, 8
Answer: 11.6