Keystones — Lintel
Five GCSE retrieval questions · 13 January 2026 · mathsvault.uk/keystones
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1. Number Multiplying in standard form
Multiply: 6.1 × 106 × 7.5 × 106
Answer: 4.58 × 1013 -
2. Algebra Solving monic quadratics
Solve: x² - 6x + 8 = 0
Answer: x = -2 or x = -4 -
3. Geometry SOHCAHTOA — missing angle
Adjacent = 24cm, hypotenuse = 29cm. Find the angle
Answer: 34.1° -
4. Ratio Reverse percentages
A price of £477.19 includes a 19% increase. What was the price before the increase?
Answer: £401.00 -
5. Statistics Range
Find the range of: -27, 24, 28, -19, 43
Answer: 70