Keystones — Cornerstone
Five GCSE retrieval questions · 6 April 2026 · mathsvault.uk/keystones
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1. Number
What is the missing number: 75 + ? = 168
Answer: 93 -
2. Algebra
Collect like terms: 5x + 6y + 6x + 6y
Answer: 11x + 12y -
3. Geometry
Find the area of a circle with radius 5cm
Answer: 78.54cm² -
4. Ratio
Simplify: 12:15:6
Answer: 4:5:2 -
5. Statistics
Find the mean of: 20, 5, 19
Answer: 14.666666666667