Keystones — Cornerstone
Five GCSE retrieval questions · 26 June 2021 · mathsvault.uk/keystones
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1. Number
Calculate: 80 + 47
Answer: 80 + 47 = 127 -
2. Algebra
Solve: 7x = 105
Answer: x = 15 -
3. Geometry
Opposite = 15cm, adjacent = 20cm. Calculate the angle
Answer: 36.9° -
4. Ratio
Simplify: 9:12:12
Answer: 3:4:4 -
5. Statistics
Calculate the mean of: 12, 39, 42, 15, 6, 5, 5
Answer: 17.7