Keystones — Lintel
Five GCSE retrieval questions · 2 January 2016 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.00036 in standard form
Answer: 3.6 × 10-4 -
2. Algebra Factorising monic quadratics
Factorise: x² - 8x - 20
Answer: (x + 2)(x - 10) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 16cm, angle = 31°. Find adjacent side. Give your answer to 2 decimal places
Answer: 13.71cm -
4. Ratio Mixed ratio problems
Divide 184 in the ratio 2:3:3
Answer: 46, 69 and 69 -
5. Statistics Mean
Calculate the mean of: 25, 25, 18, 25, 8, 44, 12. Give your answer to 2 decimal places
Answer: 22.43