Keystones — Lintel
Five GCSE retrieval questions · 13 January 2014 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.00068 in standard form
Answer: 6.8 × 10-4 -
2. Algebra Factorising monic quadratics
Factorise: x² + 5x - 14
Answer: (x + 7)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 32cm, angle = 30°. Find adjacent side. Give your answer to 2 decimal places
Answer: 27.71cm -
4. Ratio Mixed ratio problems
Divide 176 in the ratio 4:3:4
Answer: 64, 48 and 64 -
5. Statistics Mean
Calculate the mean of: 5, 6, 8, 29, 18, 25, 34. Give your answer to 2 decimal places
Answer: 17.86