Keystones — Lintel
Five GCSE retrieval questions · 21 February 2026 · mathsvault.uk/keystones
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1. Number
Calculate: 411 + 794
Answer: 411 + 794 = 1205 -
2. Algebra
What is the next term? 5, 20, 80, 320, ...
Answer: 1280 -
3. Geometry
Opposite = 17cm, adjacent = 16cm. Calculate the angle
Answer: 46.7° -
4. Ratio
Find 71% of 78
Answer: 55.38 -
5. Statistics
A spinner has 2 red, 3 blue and 2 green sections. Probability of landing on red?
Answer: 2⁄7