Keystones — Lintel
Five GCSE retrieval questions · 1 September 2013 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 5,300,000 in standard form
Answer: 5.3 × 106 -
2. Algebra Factorising monic quadratics
Factorise: x² - x - 72
Answer: (x + 8)(x - 9) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 29cm, angle = 43°. Find adjacent side. Give your answer to 2 decimal places
Answer: 21.21cm -
4. Ratio Mixed ratio problems
Orange, purple and pink sweets are in the ratio 12:6:4. What fraction of the sweets are pink?
Answer: 2⁄11 -
5. Statistics Mean
Calculate the mean of: 12, 37, 24, 34, 12, 21, 43. Give your answer to 2 decimal places
Answer: 26.14