Keystones — Lintel
Five GCSE retrieval questions · 1 June 2015 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 93,000,000 in standard form
Answer: 9.3 × 107 -
2. Algebra Factorising monic quadratics
Factorise: x² - 13x + 36
Answer: (x - 4)(x - 9) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 22cm, angle = 52°. Find adjacent side. Give your answer to 2 decimal places
Answer: 13.54cm -
4. Ratio Mixed ratio problems
Simplify the ratio 3 litres : 100 ml
Answer: 30:1 -
5. Statistics Mean
Calculate the mean of: 26, 49, 36, 12, 20, 29. Give your answer to 2 decimal places
Answer: 28.67