Keystones — Lintel
Five GCSE retrieval questions · 20 January 2017 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.0092 in standard form
Answer: 9.2 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² + x - 132
Answer: (x + 12)(x - 11) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 26cm, angle = 25°. Find adjacent side. Give your answer to 2 decimal places
Answer: 23.56cm -
4. Ratio Mixed ratio problems
Divide 210 in the ratio 4:3:3
Answer: 84, 63 and 63 -
5. Statistics Mean
Calculate the mean of: 43, 13, 46, 42, 15, 34, 5, 32
Answer: 28.75