Keystones — Cornerstone
Five GCSE retrieval questions · 14 January 2023 · mathsvault.uk/keystones
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1. Number
Calculate: 381 + 224
Answer: 381 + 224 = 605 -
2. Algebra
Factorise: 42x + 24
Answer: 6(7x + 4) -
3. Geometry
Opposite = 9cm, hypotenuse = 18cm. Find the angle
Answer: 30° (approximately) -
4. Ratio
Simplify: 9:18:12
Answer: 3:6:4 -
5. Statistics
Calculate the mean of: 50, 44, 34, 17, 12, 18, 37, 5
Answer: 27.1