Keystones — Lintel
Five GCSE retrieval questions · 25 August 2021 · mathsvault.uk/keystones
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1. Number Converting to standard form
7400000
Answer: 7.4 × 106 -
2. Algebra Factorising monic quadratics
Factorise: x² + 7x - 8
Answer: (x + 8)(x - 1) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 24cm, angle = 29°. Find adjacent side
Answer: 21cm -
4. Ratio Mixed ratio problems
£259.00 is shared between A and B in the ratio 5:2. How much does A receive?
Answer: £185.00 -
5. Statistics Mean
The mean of 4 numbers is 20. If 3 of them are 32, 21, 39, what is the missing number?
Answer: -12