Keystones — Lintel
Five GCSE retrieval questions · 13 February 2020 · mathsvault.uk/keystones
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1. Number Converting to standard form
600000
Answer: 6 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² + 4x - 5
Answer: (x + 5)(x - 1) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 31cm, angle = 29°. Find adjacent side
Answer: 27.cm -
4. Ratio Mixed ratio problems
£294.00 is shared between A and B in the ratio 5:2. How much does A receive?
Answer: £210.00 -
5. Statistics Mean
The mean of 6 numbers is 21. If 5 of them are 36, 46, 27, 43, 25, what is the missing number?
Answer: -51