Keystones — Lintel
Five GCSE retrieval questions · 5 December 2021 · mathsvault.uk/keystones
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1. Number Converting to standard form
33000000
Answer: 3.3 × 107 -
2. Algebra Factorising monic quadratics
Factorise: x² + x - 30
Answer: (x + 6)(x - 5) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 15cm, angle = 51°. Find adjacent side
Answer: 9.4cm -
4. Ratio Mixed ratio problems
£414.00 is shared between A and B in the ratio 5:4. How much does A receive?
Answer: £230.00 -
5. Statistics Mean
The mean of 5 numbers is 27. If 4 of them are 38, 48, 47, 29, what is the missing number?
Answer: -27