Keystones — Capstone
Five GCSE retrieval questions · 25 April 2025 · mathsvault.uk/keystones
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1. Number
Calculate: 6.16 + 95.66 + 0.723
Answer: 6.16 + 95.66 + 0.723 = 102.543 -
2. Algebra
Factorise fully: 20x² + 12x
Answer: 4x(5x + 3) -
3. Geometry
Adjacent = 21cm, hypotenuse = 38cm. Find the angle
Answer: 56.5° -
4. Ratio
Simplify the ratio 4m:400cm
Answer: 1:100 -
5. Statistics
The mean of 6 numbers is 31. If 5 of them are 15, 24, 21, 18, 42, what is the missing number?
Answer: 66