Keystones — Capstone
Five GCSE retrieval questions · 3 October 2021 · mathsvault.uk/keystones
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1. Number
0.00032
Answer: 3.2 × 10^-4 -
2. Algebra
Solve: x⁄2 = 13
Answer: x = 26 -
3. Geometry
Find c if a = 10cm and b = 20cm in a right triangle
Answer: 22.4cm -
4. Ratio
Calculate 35.3% of 762
Answer: 268.99 -
5. Statistics
The mean of 6 numbers is 39. If 5 of them are 27, 47, 22, 40, 19, what is the missing number?
Answer: 79