Keystones — Lintel
Five GCSE retrieval questions · 22 October 2023 · mathsvault.uk/keystones
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1. Number
What is the missing number: 87 + ? = 155
Answer: 68 -
2. Algebra
Solve: 4x = 48
Answer: x = 12 -
3. Geometry
Calculate the area of a right triangle with perpendicular sides 15cm and 9cm
Answer: 67.5cm² -
4. Ratio
Calculate 41.6% of 815
Answer: 339.04 -
5. Statistics
Calculate the mean of: 23, 43, 37, 14, 22, 23, 11
Answer: 24.7