Keystones — Cornerstone
Five GCSE retrieval questions · 17 June 2026 · mathsvault.uk/keystones
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1. Number Rounding to significant figures
Round 9088 to 2 significant figures
Answer: 9100 -
2. Algebra Factorising into a single bracket
Factorise: 6x² + 7x
Answer: x(6x + 7) -
3. Geometry Speed, distance and time
A cyclist travels 358km in 3 hours. What is their average speed?
Answer: 119.33333333333km/h -
4. Ratio Percentage increase and decrease
Increase 153 by 25%
Answer: 191.25 -
5. Statistics Simple probability
A bag has 6 red and 7 blue balls. What is the probability of picking a red ball?
Answer: 6⁄13