Keystones — Lintel
Five GCSE retrieval questions · 19 April 2026 · mathsvault.uk/keystones
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1. Number
Calculate: (-30) + (-25) + (-16)
Answer: -71 -
2. Algebra
Solve: x⁄4 = 5
Answer: x = 20 -
3. Geometry
Opposite = 8cm, adjacent = 13cm. Calculate the angle
Answer: 31.6° -
4. Ratio
Simplify the ratio 7m:700cm
Answer: 1:100 -
5. Statistics
A bag has 4 red and 5 blue balls. What is the probability of picking a red ball?
Answer: 4⁄9