Keystones — Cornerstone
Five GCSE retrieval questions · 15 April 2024 · mathsvault.uk/keystones
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1. Number
What is the missing number: 86 + ? = 169
Answer: 83 -
2. Algebra
Solve: x + 10 = 25
Answer: x = 15 -
3. Geometry
Opposite = 8cm, hypotenuse = 16cm. Find the angle
Answer: 30° (approximately) -
4. Ratio
Simplify: 20:8:12
Answer: 5:2:3 -
5. Statistics
Calculate the mean of: 26, 47, 44, 47, 39, 45, 47
Answer: 42.1