Keystones — Lintel
Five GCSE retrieval questions · 6 June 2022 · mathsvault.uk/keystones
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1. Number Converting to standard form
72000
Answer: 7.2 × 104 -
2. Algebra Factorising monic quadratics
Factorise: x² - 9x + 18
Answer: (x - 3)(x - 6) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 20cm, angle = 35°. Find adjacent side
Answer: 16.4cm -
4. Ratio Mixed ratio problems
£160.00 is shared between A and B in the ratio 2:3. How much does A receive?
Answer: £64.00 -
5. Statistics Mean
The mean of 5 numbers is 25. If 4 of them are 25, 50, 48, 35, what is the missing number?
Answer: -33