Keystones — Lintel
Five GCSE retrieval questions · 25 April 2026 · mathsvault.uk/keystones
-
1. Number Multiplying in standard form
Multiply: 7.6 × 104 × 6.7 × 103
Answer: 5.09 × 108 -
2. Algebra Solving monic quadratics
Solve: x² - 5x + 6 = 0
Answer: x = -2 or x = -3 -
3. Geometry SOHCAHTOA — missing angle
Adjacent = 30cm, hypotenuse = 35cm. Find the angle
Answer: 31° -
4. Ratio Reverse percentages
A price of £330.24 includes a 28% increase. What was the price before the increase?
Answer: £258.00 -
5. Statistics Range
Find the range of: 38, 21, -28, 15, 14
Answer: 66