Keystones — Lintel
Five GCSE retrieval questions · 17 August 2016 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 2,000,000 in standard form
Answer: 2 × 106 -
2. Algebra Factorising monic quadratics
Factorise: x² + 7x - 18
Answer: (x + 9)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 39cm, angle = 29°. Find adjacent side. Give your answer to 2 decimal places
Answer: 34.11cm -
4. Ratio Mixed ratio problems
£273.00 is shared between A and B in the ratio 2:5. How much does A receive?
Answer: £78.00 -
5. Statistics Mean
The mean of 5 numbers is 32. If 4 of them are 24, 19, 30, 41, what is the missing number?
Answer: 46