Keystones — Capstone
Five GCSE retrieval questions · 21 December 2024 · 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
Complete the square: x² + 2.2x
Answer: (x + 1.1)² - 1.21 -
3. Geometry
Find the distance between (-1, -6) and (8, 11)
Answer: 19.24 -
4. Ratio
Simplify the ratio 6m:600cm
Answer: 1:100 -
5. Statistics
The mean of 5 numbers is 22. If 4 of them are 42, 49, 28, 16, what is the missing number?
Answer: -25