Keystones — Lintel
Five GCSE retrieval questions · 27 October 2015 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 59,000,000 in standard form
Answer: 5.9 × 107 -
2. Algebra Factorising monic quadratics
Factorise: x² - 3x - 4
Answer: (x + 1)(x - 4) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 33cm, angle = 49°. Find adjacent side. Give your answer to 2 decimal places
Answer: 21.65cm -
4. Ratio Mixed ratio problems
Simplify the ratio 7m : 50cm
Answer: 14:1 -
5. Statistics Mean
Calculate the mean of: 50, 49, 49, 28, 32, 32
Answer: 40