Keystones — Capstone
Five GCSE retrieval questions · 12 April 2022 · mathsvault.uk/keystones
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1. Number
0.0076
Answer: 7.6 × 10^-3 -
2. Algebra
Factorise fully: 20x² + 15x
Answer: 5x(4x + 3) -
3. Geometry
Find the distance between (-7, -4) and (9, 7)
Answer: 19.42 -
4. Ratio
Simplify the ratio 3m:300cm
Answer: 1:100 -
5. Statistics
The mean of 5 numbers is 32. If 4 of them are 35, 20, 32, 48, what is the missing number?
Answer: 25