Keystones — Lintel
Five GCSE retrieval questions · 26 June 2014 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 380,000,000 in standard form
Answer: 3.8 × 108 -
2. Algebra Factorising monic quadratics
Factorise: x² + 18x + 80
Answer: (x + 10)(x + 8) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 32cm, angle = 33°. Find adjacent side. Give your answer to 2 decimal places
Answer: 26.84cm -
4. Ratio Mixed ratio problems
Divide 234 in the ratio 2:3:4
Answer: 52, 78 and 104 -
5. Statistics Mean
Calculate the mean of: 26, 44, 47, 49, 15, 39, 13, 31
Answer: 33