Keystones — Cornerstone
Five GCSE retrieval questions · 20 March 2022 · mathsvault.uk/keystones
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1. Number
Calculate: 429 + 847
Answer: 429 + 847 = 1276 -
2. Algebra
Factorise: 21x + 6
Answer: 3(7x + 2) -
3. Geometry
Find the area of a circle with radius 9cm
Answer: 254.47cm² -
4. Ratio
Simplify: 12:18:9
Answer: 4:6:3 -
5. Statistics
Calculate the mean of: 27, 21, 22, 42, 35, 49
Answer: 32.7