Keystones — Cornerstone
Five GCSE retrieval questions · 24 September 2023 · mathsvault.uk/keystones
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1. Number
What is the missing number: 72 + ? = 144
Answer: 72 -
2. Algebra
Solve: x + 6 = 14
Answer: x = 8 -
3. Geometry
Find the perimeter of a right triangle with sides 5cm, 12cm, 13cm
Answer: 30cm -
4. Ratio
Calculate 10% of 68
Answer: 6.8 -
5. Statistics
Calculate the range of: 48, 80, 76, 112, 61, 106
Answer: 64