Keystones — Capstone
Five GCSE retrieval questions · 12 September 2023 · mathsvault.uk/keystones
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1. Number
0.00031
Answer: 3.1 × 10^-4 -
2. Algebra
Factorise fully: 25x² + 20x
Answer: 5x(5x + 4) -
3. Geometry
Adjacent = 25cm, hypotenuse = 33cm. Find the angle
Answer: 40.7° -
4. Ratio
Simplify the ratio 4m:400cm
Answer: 1:100 -
5. Statistics
The mean of 5 numbers is 27. If 4 of them are 41, 48, 25, 36, what is the missing number?
Answer: -15