Keystones — Lintel
Five GCSE retrieval questions · 18 December 2017 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 53,000 in standard form
Answer: 5.3 × 104 -
2. Algebra Factorising monic quadratics
Factorise: x² - 2x - 35
Answer: (x + 5)(x - 7) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 21cm, angle = 45°. Find adjacent side. Give your answer to 2 decimal places
Answer: 14.85cm -
4. Ratio Mixed ratio problems
Simplify the ratio 5 litres : 800 ml
Answer: 25:4 -
5. Statistics Mean
Calculate the mean of: 12, 21, 37, 26, 41, 8. Give your answer to 2 decimal places
Answer: 24.17