Keystones — Lintel
Five GCSE retrieval questions · 4 December 2017 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 6,600,000 in standard form
Answer: 6.6 × 106 -
2. Algebra Factorising monic quadratics
Factorise: x² - 7x - 8
Answer: (x + 1)(x - 8) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 29cm, angle = 48°. Find opposite. Give your answer to 2 decimal places
Answer: 32.21cm -
4. Ratio Mixed ratio problems
Divide 240 in the ratio 2:2:1
Answer: 96, 96 and 48 -
5. Statistics Mean
Calculate the mean of: 10, 32, 37, 48, 8, 19, 44. Give your answer to 2 decimal places
Answer: 28.29