Keystones — Lintel
Five GCSE retrieval questions · 9 January 2014 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 98,000 in standard form
Answer: 9.8 × 104 -
2. Algebra Factorising monic quadratics
Factorise: x² + 4x - 60
Answer: (x + 10)(x - 6) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 39cm, angle = 51°. Find adjacent side. Give your answer to 2 decimal places
Answer: 24.54cm -
4. Ratio Mixed ratio problems
Divide 210 in the ratio 3:3:4
Answer: 63, 63 and 84 -
5. Statistics Mean
Calculate the mean of: 22, 16, 30, 24, 37, 13, 50. Give your answer to 2 decimal places
Answer: 27.43