Keystones — Lintel
Five GCSE retrieval questions · 3 November 2025 · mathsvault.uk/keystones
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1. Number
Calculate: 4⁄5 + 3⁄4 + 3⁄6
Answer: 41⁄20 -
2. Algebra
Factorise fully: 14x² + 10x
Answer: 2x(7x + 5) -
3. Geometry
Find c if a = 19cm and b = 14cm in a right triangle
Answer: 23.6cm -
4. Ratio
Find 46% of 285
Answer: 131.1 -
5. Statistics
A bag has 6 red and 8 blue balls. What is the probability of picking a red ball?
Answer: 3⁄7