Keystones — Lintel
Five GCSE retrieval questions · 12 January 2017 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.098 in standard form
Answer: 9.8 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² - 16x + 63
Answer: (x - 7)(x - 9) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 30cm, angle = 59°. Find adjacent side. Give your answer to 2 decimal places
Answer: 15.45cm -
4. Ratio Mixed ratio problems
Simplify the ratio 2m : 90cm
Answer: 20:9 -
5. Statistics Mean
Calculate the mean of: 39, 46, 14, 47, 12, 43
Answer: 33.5