Keystones — Lintel
Five GCSE retrieval questions · 28 May 2016 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.00092 in standard form
Answer: 9.2 × 10-4 -
2. Algebra Factorising monic quadratics
Factorise: x² + 6x - 16
Answer: (x + 8)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 22cm, angle = 31°. Find opposite. Give your answer to 2 decimal places
Answer: 13.22cm -
4. Ratio Mixed ratio problems
Divide 130 in the ratio 1:2:2
Answer: 26, 52 and 52 -
5. Statistics Mean
Calculate the mean of: 34, 20, 32, 19, 18, 50, 30, 22. Give your answer to 2 decimal places
Answer: 28.13