Keystones — Cornerstone
Five GCSE retrieval questions · 10 February 2025 · mathsvault.uk/keystones
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1. Number
What is the missing number: 42 + ? = 106
Answer: 64 -
2. Algebra
Expand: 4(6x + 5)
Answer: 24x + 20 -
3. Geometry
Find the area of a right triangle with base 5cm and height 8cm
Answer: 20cm² -
4. Ratio
Simplify: 12:15:12
Answer: 4:5:4 -
5. Statistics
Find the mean of: 8, 14, 11, 12
Answer: 11.25