Keystones — Lintel
Five GCSE retrieval questions · 11 October 2016 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 240,000 in standard form
Answer: 2.4 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² + 2x - 35
Answer: (x + 7)(x - 5) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 39cm, angle = 30°. Find adjacent side. Give your answer to 2 decimal places
Answer: 33.77cm -
4. Ratio Mixed ratio problems
Divide 240 in the ratio 2:1:1
Answer: 120, 60 and 60 -
5. Statistics Mean
Calculate the mean of: 13, 11, 7, 15, 42, 30. Give your answer to 2 decimal places
Answer: 19.67