Keystones — Capstone
Five GCSE retrieval questions · 16 March 2021 · mathsvault.uk/keystones
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1. Number
Calculate: 1⁄6 + 1⁄6 + 2⁄4
Answer: 5⁄6 -
2. Algebra
Factorise fully: 6x² + 21x
Answer: 3x(2x + 7) -
3. Geometry
Adjacent = 13cm, hypotenuse = 32cm. Find the angle
Answer: 66° -
4. Ratio
Simplify the ratio 5m:500cm
Answer: 1:100 -
5. Statistics
The mean of 6 numbers is 24. If 5 of them are 21, 43, 30, 30, 30, what is the missing number?
Answer: -10