Keystones — Lintel
Five GCSE retrieval questions · 1 August 2018 · mathsvault.uk/keystones
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1. Number Converting to standard form
620000
Answer: 6.2 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² + 3x - 10
Answer: (x + 5)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 15cm, angle = 61°. Find adjacent side
Answer: 7.3cm -
4. Ratio Mixed ratio problems
£288.00 is shared between A and B in the ratio 3:5. How much does A receive?
Answer: £108.00 -
5. Statistics Mean
The mean of 6 numbers is 26. If 5 of them are 38, 22, 28, 36, 22, what is the missing number?
Answer: 10