Keystones — Lintel
Five GCSE retrieval questions · 26 April 2014 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 86,000,000 in standard form
Answer: 8.6 × 107 -
2. Algebra Factorising monic quadratics
Factorise: x² - 5x - 24
Answer: (x + 3)(x - 8) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 29cm, angle = 36°. Find opposite. Give your answer to 2 decimal places
Answer: 21.07cm -
4. Ratio Mixed ratio problems
Divide 80 in the ratio 2:1:1
Answer: 40, 20 and 20 -
5. Statistics Mean
Calculate the mean of: 27, 40, 40, 8, 10, 37, 19. Give your answer to 2 decimal places
Answer: 25.86