Keystones — Capstone
Five GCSE retrieval questions · 27 September 2025 · mathsvault.uk/keystones
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1. Number
Calculate: 996 + 883
Answer: 1879 -
2. Algebra
Solve: x⁄6 = 4.6666666666667
Answer: x = 28 -
3. Geometry
Adjacent = 13cm, hypotenuse = 21cm. Find the angle
Answer: 51.8° -
4. Ratio
Calculate 42.5% of 900
Answer: 382.5 -
5. Statistics
The mean of 4 numbers is 30. If 3 of them are 39, 50, 16, what is the missing number?
Answer: 15