Keystones — Cornerstone
Five GCSE retrieval questions · 18 May 2021 · mathsvault.uk/keystones
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1. Number
What is the missing number: 81 + ? = 121
Answer: 40 -
2. Algebra
Solve: 7x = 49
Answer: x = 7 -
3. Geometry
Opposite = 12cm, adjacent = 10cm. Calculate the angle
Answer: 50.2° -
4. Ratio
Simplify: 18:6:12
Answer: 3:1:2 -
5. Statistics
Calculate the range of: 96, 30, 38, 100, 33, 108
Answer: 78