Keystones — Cornerstone
Five GCSE retrieval questions · 21 March 2023 · mathsvault.uk/keystones
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1. Number
What is the missing number: 79 + ? = 124
Answer: 45 -
2. Algebra
Expand: 5(5x + 2)
Answer: 25x + 10 -
3. Geometry
Opposite = 14cm, adjacent = 10cm. Calculate the angle
Answer: 54.5° -
4. Ratio
Simplify: 18:6:12
Answer: 3:1:2 -
5. Statistics
Find the mean of: 5, 2, 17, 13, 3
Answer: 8