Keystones — Cornerstone
Five GCSE retrieval questions · 24 September 2024 · mathsvault.uk/keystones
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1. Number
What is the missing number: 66 + ? = 146
Answer: 80 -
2. Algebra
Factorise: 2x² + 9x
Answer: x(2x + 9) -
3. Geometry
Opposite = 10cm, hypotenuse = 20cm. Find the angle
Answer: 30° (approximately) -
4. Ratio
Calculate 25% of 74
Answer: 18.5 -
5. Statistics
Calculate the mean of: 38, 48, 17, 24, 50, 7, 33, 46
Answer: 32.9