Keystones — Lintel
Five GCSE retrieval questions · 18 April 2025 · mathsvault.uk/keystones
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1. Number
The sum of three consecutive numbers is 150. What are the numbers?
Answer: 49, 50, and 51 -
2. Algebra
For y = x³ + 5, calculate y when x = 3
Answer: y = 32 -
3. Geometry
Opposite = 18cm, adjacent = 19cm. Calculate the angle
Answer: 43.5° -
4. Ratio
Simplify: 24:20:8
Answer: 6:5:2 -
5. Statistics
Calculate the mean of: 17, 42, 24, 5, 21, 36, 42
Answer: 26.7