Keystones — Lintel
Five GCSE retrieval questions · 4 July 2015 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 940,000 in standard form
Answer: 9.4 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² - 8x - 9
Answer: (x + 1)(x - 9) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 17cm, angle = 49°. Find adjacent side. Give your answer to 2 decimal places
Answer: 11.15cm -
4. Ratio Mixed ratio problems
Simplify the ratio 5m : 15cm
Answer: 100:3 -
5. Statistics Mean
Calculate the mean of: 32, 28, 49, 21, 39, 37, 23. Give your answer to 2 decimal places
Answer: 32.71