Keystones — Lintel
Five GCSE retrieval questions · 17 December 2011 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.00026 in standard form
Answer: 2.6 × 10-4 -
2. Algebra Factorising monic quadratics
Factorise: x² - 16x + 60
Answer: (x - 6)(x - 10) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 37cm, angle = 52°. Find adjacent side. Give your answer to 2 decimal places
Answer: 22.78cm -
4. Ratio Mixed ratio problems
Simplify the ratio 2 litres : 700 ml
Answer: 20:7 -
5. Statistics Mean
Calculate the mean of: 9, 9, 5, 41, 13, 13, 44. Give your answer to 2 decimal places
Answer: 19.14