Keystones — Lintel
Five GCSE retrieval questions · 23 March 2017 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 11,000 in standard form
Answer: 1.1 × 104 -
2. Algebra Factorising monic quadratics
Factorise: x² + 2x - 48
Answer: (x + 8)(x - 6) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 26cm, angle = 31°. Find adjacent side. Give your answer to 2 decimal places
Answer: 22.29cm -
4. Ratio Mixed ratio problems
Divide 99 in the ratio 4:2:3
Answer: 44, 22 and 33 -
5. Statistics Mean
Calculate the mean of: 10, 27, 26, 44, 37, 24, 18. Give your answer to 2 decimal places
Answer: 26.57