Keystones — Lintel
Five GCSE retrieval questions · 2 December 2016 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 96,000,000 in standard form
Answer: 9.6 × 107 -
2. Algebra Factorising monic quadratics
Factorise: x² + 5x - 36
Answer: (x + 9)(x - 4) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 15cm, angle = 64°. Find adjacent side. Give your answer to 2 decimal places
Answer: 6.58cm -
4. Ratio Mixed ratio problems
Red, blue and green counters are in the ratio 9:2:5. What fraction of the counters are red?
Answer: 9⁄16 -
5. Statistics Mean
Calculate the mean of: 26, 41, 42, 6, 33, 19. Give your answer to 2 decimal places
Answer: 27.83