Keystones — Lintel
Five GCSE retrieval questions · 11 September 2014 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.064 in standard form
Answer: 6.4 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² - 6x - 40
Answer: (x + 4)(x - 10) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 38cm, angle = 29°. Find adjacent side. Give your answer to 2 decimal places
Answer: 33.24cm -
4. Ratio Mixed ratio problems
Simplify: 12:20:24
Answer: 3:5:6 -
5. Statistics Mean
Calculate the mean of: 41, 36, 16, 9, 13, 38, 39, 44
Answer: 29.5