Keystones — Lintel
Five GCSE retrieval questions · 4 May 2022 · mathsvault.uk/keystones
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1. Number
The sum of three consecutive numbers is 138. What are the numbers?
Answer: 45, 46, and 47 -
2. Algebra
Solve: 4x + 8 = 3x - 10
Answer: x = 18 -
3. Geometry
Find perimeter: adjacent = 18cm, angle = 51°
Answer: 68.8cm -
4. Ratio
Simplify: 12:12:8
Answer: 3:3:2 -
5. Statistics
Calculate the mean of: 12, 15, 35, 7, 19, 29, 48
Answer: 23.6