Keystones — Bedrock
Five GCSE retrieval questions · 21 August 2021 · mathsvault.uk/keystones
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1. Number
Calculate: 27 + 49
Answer: 27 + 49 = 76 -
2. Algebra
Factorise: 18x + 21
Answer: 3(6x + 7) -
3. Geometry
Find the area of a right triangle with base 4cm and height 10cm
Answer: 20cm² -
4. Ratio
Simplify the ratio 20:30
Answer: 2:3 -
5. Statistics
Find the mean of: 17, 13, 13
Answer: 14.333333333333