Keystones — Lintel
Five GCSE retrieval questions · 12 March 2025 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.07
Answer: 7 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² - 12x + 35
Answer: (x - 7)(x - 5) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 34cm, angle = 34°. Find adjacent side
Answer: 28.2cm -
4. Ratio Mixed ratio problems
£245.00 is shared between A and B in the ratio 5:2. How much does A receive?
Answer: £175.00 -
5. Statistics Mean
The mean of 5 numbers is 34. If 4 of them are 21, 28, 40, 40, what is the missing number?
Answer: 41