Keystones — Lintel
Five GCSE retrieval questions · 6 December 2015 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 800,000,000 in standard form
Answer: 8 × 108 -
2. Algebra Factorising monic quadratics
Factorise: x² - x - 2
Answer: (x + 1)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 15cm, angle = 28°. Find adjacent side. Give your answer to 2 decimal places
Answer: 13.24cm -
4. Ratio Mixed ratio problems
Simplify the ratio 2kg : 500g
Answer: 4:1 -
5. Statistics Mean
Calculate the mean of: 35, 19, 38, 37, 30, 8. Give your answer to 2 decimal places
Answer: 27.83