Keystones — Lintel
Five GCSE retrieval questions · 21 December 2014 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 140,000 in standard form
Answer: 1.4 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² + 7x - 18
Answer: (x + 9)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 35cm, angle = 30°. Find adjacent side. Give your answer to 2 decimal places
Answer: 30.31cm -
4. Ratio Mixed ratio problems
Divide 140 in the ratio 4:2:1
Answer: 80, 40 and 20 -
5. Statistics Mean
Calculate the mean of: 26, 43, 18, 36, 24, 13, 6. Give your answer to 2 decimal places
Answer: 23.71