Keystones — Cornerstone
Five GCSE retrieval questions · 29 December 2024 · mathsvault.uk/keystones
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1. Number
Calculate: 45 + 81
Answer: 45 + 81 = 126 -
2. Algebra
Expand: 3(5x + 7)
Answer: 15x + 21 -
3. Geometry
Opposite = 12cm, hypotenuse = 13.9cm. Find the angle
Answer: 60° (approximately) -
4. Ratio
Simplify: 6:9:6
Answer: 2:3:2 -
5. Statistics
Calculate the mean of: 36, 17, 28, 17, 45, 25, 15
Answer: 26.1