Keystones — Cornerstone
Five GCSE retrieval questions · 16 January 2024 · mathsvault.uk/keystones
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1. Number
What is the missing number: 77 + ? = 170
Answer: 93 -
2. Algebra
Solve: x + 9 = 17
Answer: x = 8 -
3. Geometry
Opposite = 9cm, hypotenuse = 12.7cm. Find the angle
Answer: 45° (approximately) -
4. Ratio
Find 83% of 196
Answer: 162.68 -
5. Statistics
Find the mean of: 5, 10, 4
Answer: 6.3333333333333