Keystones — Lintel
Five GCSE retrieval questions · 22 June 2016 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.000084 in standard form
Answer: 8.4 × 10-5 -
2. Algebra Factorising monic quadratics
Factorise: x² - 17x + 70
Answer: (x - 7)(x - 10) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 28cm, angle = 53°. Find adjacent side. Give your answer to 2 decimal places
Answer: 16.85cm -
4. Ratio Mixed ratio problems
Divide 216 in the ratio 4:3:1
Answer: 108, 81 and 27 -
5. Statistics Mean
Calculate the mean of: 18, 44, 40, 30, 45, 22, 9. Give your answer to 2 decimal places
Answer: 29.71