Keystones — Capstone
Five GCSE retrieval questions · 18 December 2022 · mathsvault.uk/keystones
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1. Number
The sum of three consecutive numbers is 108. What are the numbers?
Answer: 35, 36, and 37 -
2. Algebra
Complete the square: x² + 2.2x
Answer: (x + 1.1)² - 1.21 -
3. Geometry
Adjacent = 27cm, hypotenuse = 47cm. Find the angle
Answer: 54.9° -
4. Ratio
Simplify the ratio 7m:700cm
Answer: 1:100 -
5. Statistics
The mean of 4 numbers is 33. If 3 of them are 48, 22, 15, what is the missing number?
Answer: 47