Keystones — Capstone
Five GCSE retrieval questions · 1 August 2021 · mathsvault.uk/keystones
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1. Number
The sum of three consecutive numbers is 123. What are the numbers?
Answer: 40, 41, and 42 -
2. Algebra
Expand: 2(5x - 8)
Answer: 10x - 16 -
3. Geometry
Find c if a = 13cm and b = 20cm in a right triangle
Answer: 23.9cm -
4. Ratio
Simplify the ratio 8m:800cm
Answer: 1:100 -
5. Statistics
The mean of 5 numbers is 34. If 4 of them are 35, 38, 47, 40, what is the missing number?
Answer: 10