Keystones — Cornerstone
Five GCSE retrieval questions · 27 April 2026 · mathsvault.uk/keystones
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1. Number Rounding to significant figures
Round 9217 to 2 significant figures
Answer: 9200 -
2. Algebra Factorising into a single bracket
Factorise: 4x² + 4x
Answer: 4x(x + 1) -
3. Geometry Speed, distance and time
A car travels at 20km/h for 4 hours. How far does it travel?
Answer: 80km -
4. Ratio Percentage increase and decrease
Decrease 107 by 13%
Answer: 93.09 -
5. Statistics Simple probability
What is the probability of rolling a 2 on a fair die?
Answer: 1⁄6