Keystones — Lintel
Five GCSE retrieval questions · 22 July 2017 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 90,000 in standard form
Answer: 9 × 104 -
2. Algebra Factorising monic quadratics
Factorise: x² - 2x - 15
Answer: (x + 3)(x - 5) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 22cm, angle = 47°. Find adjacent side. Give your answer to 2 decimal places
Answer: 15cm -
4. Ratio Mixed ratio problems
Simplify the ratio 6m : 40cm
Answer: 15:1 -
5. Statistics Mean
Calculate the mean of: 14, 6, 30, 37, 17, 18, 25
Answer: 21