Keystones — Lintel
Five GCSE retrieval questions · 18 August 2017 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.0052 in standard form
Answer: 5.2 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² + x - 2
Answer: (x + 2)(x - 1) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 22cm, angle = 59°. Find adjacent side. Give your answer to 2 decimal places
Answer: 11.33cm -
4. Ratio Mixed ratio problems
£234.00 is shared between A and B in the ratio 2:1. How much does A receive?
Answer: £156.00 -
5. Statistics Mean
The mean of 5 numbers is 34. If 4 of them are 42, 17, 40, 39, what is the missing number?
Answer: 32