Keystones — Lintel
Five GCSE retrieval questions · 14 September 2012 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 70,000 in standard form
Answer: 7 × 104 -
2. Algebra Factorising monic quadratics
Factorise: x² + 3x - 70
Answer: (x + 10)(x - 7) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 27cm, angle = 43°. Find adjacent side. Give your answer to 2 decimal places
Answer: 19.75cm -
4. Ratio Mixed ratio problems
Orange, purple and pink counters are in the ratio 2:3:1. What fraction of the counters are pink?
Answer: 1⁄6 -
5. Statistics Mean
Calculate the mean of: 22, 35, 23, 28, 45, 7. Give your answer to 2 decimal places
Answer: 26.67