Keystones — Lintel
Five GCSE retrieval questions · 16 December 2014 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 750,000 in standard form
Answer: 7.5 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² + 14x + 33
Answer: (x + 11)(x + 3) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 24cm, angle = 64°. Find adjacent side. Give your answer to 2 decimal places
Answer: 10.52cm -
4. Ratio Mixed ratio problems
Divide 210 in the ratio 2:1:4
Answer: 60, 30 and 120 -
5. Statistics Mean
Calculate the mean of: 36, 50, 31, 16, 41, 28, 32, 19. Give your answer to 2 decimal places
Answer: 31.63