Keystones — Capstone
Five GCSE retrieval questions · 15 February 2023 · mathsvault.uk/keystones
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1. Number
The sum of three consecutive numbers is 150. What are the numbers?
Answer: 49, 50, and 51 -
2. Algebra
Simplify: 11x - 10x + 6y - 3y
Answer: x + 3y -
3. Geometry
Find c if a = 8cm and b = 22cm in a right triangle
Answer: 23.4cm -
4. Ratio
Calculate 45.4% of 527
Answer: 239.26 -
5. Statistics
The mean of 5 numbers is 22. If 4 of them are 39, 47, 22, 19, what is the missing number?
Answer: -17