Keystones — Capstone
Five GCSE retrieval questions · 29 August 2026 · mathsvault.uk/keystones
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1. Number Multiplying in standard form
Multiply: 7.1 × 105 × 4.3 × 104
Answer: 3.05 × 1010 -
2. Algebra Inequalities with unknowns on both sides
Solve: 4x + 10 ≤ x - 8
Answer: x ≤ 6 -
3. Geometry Area using Pythagoras
Calculate the area of a right triangle with perpendicular sides 13cm and 13cm
Answer: 84.5cm² -
4. Ratio Ratio given the difference
In ratio 3:1, the difference between shares is 150. What is the total?
Answer: 300 -
5. Statistics Mode
Find the mode of: 62, 46, 27, 17, 72
Answer: No mode