Keystones — Lintel
Five GCSE retrieval questions · 9 June 2026 · mathsvault.uk/keystones
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1. Number Multiplying in standard form
Multiply: 3.9 × 106 × 8.8 × 106
Answer: 3.43 × 1013 -
2. Algebra Solving monic quadratics
Solve: x² + x - 30 = 0
Answer: x = 5 or x = -6 -
3. Geometry SOHCAHTOA — missing angle
Adjacent = 25cm, hypotenuse = 35cm. Find the angle
Answer: 44.4° -
4. Ratio Reverse percentages
A price of £904.40 includes a 33% increase. What was the price before the increase?
Answer: £680.00 -
5. Statistics Range
Calculate the range of: 77, 69, 88, 64, 81, 46
Answer: 42