Keystones — Capstone
Five GCSE retrieval questions · 26 December 2022 · mathsvault.uk/keystones
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1. Number
The sum of three consecutive numbers is 129. What are the numbers?
Answer: 42, 43, and 44 -
2. Algebra
Solve: x⁄3 = 12
Answer: x = 36 -
3. Geometry
Find c if a = 20cm and b = 13cm in a right triangle
Answer: 23.9cm -
4. Ratio
Simplify the ratio 2m:200cm
Answer: 1:100 -
5. Statistics
The mean of 4 numbers is 40. If 3 of them are 23, 16, 16, what is the missing number?
Answer: 105