Keystones — Lintel
Five GCSE retrieval questions · 24 February 2022 · mathsvault.uk/keystones
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1. Number
The sum of three consecutive numbers is 129. What are the numbers?
Answer: 42, 43, and 44 -
2. Algebra
Solve: 6x = 66
Answer: x = 11 -
3. Geometry
Find perimeter: adjacent = 14cm, angle = 34°
Answer: 40.3cm -
4. Ratio
Find 22% of 381
Answer: 83.82 -
5. Statistics
A bag has 5 red and 8 blue balls. What is the probability of picking a red ball?
Answer: 5⁄13