Keystones — Lintel
Five GCSE retrieval questions · 28 October 2015 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 290,000,000 in standard form
Answer: 2.9 × 108 -
2. Algebra Factorising monic quadratics
Factorise: x² + 3x - 54
Answer: (x + 9)(x - 6) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 40cm, angle = 63°. Find adjacent side. Give your answer to 2 decimal places
Answer: 18.16cm -
4. Ratio Mixed ratio problems
Orange, purple and pink beads are in the ratio 2:5:8. What fraction of the beads are pink?
Answer: 8⁄15 -
5. Statistics Mean
Calculate the mean of: 33, 33, 8, 7, 39, 41, 41. Give your answer to 2 decimal places
Answer: 28.86