Keystones — Capstone
Five GCSE retrieval questions · 22 March 2022 · mathsvault.uk/keystones
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1. Number
Calculate: 990 + 611
Answer: 1601 -
2. Algebra
Factorise fully: 20x² + 25x
Answer: 5x(4x + 5) -
3. Geometry
A right triangle has hypotenuse 17cm and one side 8cm. Find its area
Answer: 60cm² -
4. Ratio
Calculate 48.7% of 870
Answer: 423.69 -
5. Statistics
The mean of 6 numbers is 31. If 5 of them are 16, 23, 17, 33, 45, what is the missing number?
Answer: 52