Keystones — Capstone
Five GCSE retrieval questions · 3 September 2023 · mathsvault.uk/keystones
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1. Number
Calculate: (-10) + (-25) + (-20)
Answer: -55 -
2. Algebra
Factorise fully: 15x² + 25x
Answer: 5x(3x + 5) -
3. Geometry
Adjacent = 23cm, hypotenuse = 42cm. Find the angle
Answer: 56.8° -
4. Ratio
Simplify the ratio 4m:400cm
Answer: 1:100 -
5. Statistics
The mean of 5 numbers is 22. If 4 of them are 37, 34, 26, 32, what is the missing number?
Answer: -19