Keystones — Capstone
Five GCSE retrieval questions · 16 February 2023 · mathsvault.uk/keystones
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1. Number
Simplify: √8 + √18
Answer: 2√2 + 3√2 = 5√2 -
2. Algebra
Factorise fully: 8x² + 10x
Answer: 2x(4x + 5) -
3. Geometry
Adjacent = 25cm, hypotenuse = 30cm. Find the angle
Answer: 33.6° -
4. Ratio
Simplify the ratio 4m:400cm
Answer: 1:100 -
5. Statistics
The mean of 4 numbers is 37. If 3 of them are 35, 30, 28, what is the missing number?
Answer: 55