Keystones — Cornerstone
Five GCSE retrieval questions · 5 January 2026 · mathsvault.uk/keystones
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1. Number
What is the missing number: 67 + ? = 194
Answer: 127 -
2. Algebra
Collect like terms: 4x + 2y + 3x + 7y
Answer: 7x + 9y -
3. Geometry
Opposite = 14cm, hypotenuse = 19.8cm. Find the angle
Answer: 45° (approximately) -
4. Ratio
Find 85% of 188
Answer: 159.8 -
5. Statistics
Calculate the mean of: 31, 5, 30, 19, 10, 32
Answer: 21.2