Keystones — Lintel
Five GCSE retrieval questions · 5 December 2016 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 4,500,000 in standard form
Answer: 4.5 × 106 -
2. Algebra Factorising monic quadratics
Factorise: x² + x - 56
Answer: (x + 8)(x - 7) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 26cm, angle = 45°. Find adjacent side. Give your answer to 2 decimal places
Answer: 18.38cm -
4. Ratio Mixed ratio problems
Divide 72 in the ratio 2:1:3
Answer: 24, 12 and 36 -
5. Statistics Mean
The mean of 5 numbers is 39. If 4 of them are 41, 22, 23, 48, what is the missing number?
Answer: 61