Keystones — Capstone
Five GCSE retrieval questions · 20 September 2023 · mathsvault.uk/keystones
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1. Number
The sum of three consecutive numbers is 117. What are the numbers?
Answer: 38, 39, and 40 -
2. Algebra
Factorise fully: 35x² + 15x
Answer: 5x(7x + 3) -
3. Geometry
Adjacent = 25cm, hypotenuse = 44cm. Find the angle
Answer: 55.4° -
4. Ratio
Simplify the ratio 6m:600cm
Answer: 1:100 -
5. Statistics
The mean of 5 numbers is 28. If 4 of them are 25, 30, 28, 28, what is the missing number?
Answer: 29