Keystones — Lintel
Five GCSE retrieval questions · 9 December 2013 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.00043 in standard form
Answer: 4.3 × 10-4 -
2. Algebra Factorising monic quadratics
Factorise: x² + 16x + 64
Answer: (x + 8)(x + 8) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 34cm, angle = 44°. Find adjacent side. Give your answer to 2 decimal places
Answer: 24.46cm -
4. Ratio Mixed ratio problems
Orange, purple and pink counters are in the ratio 9:3:10. What fraction of the counters are purple?
Answer: 3⁄22 -
5. Statistics Mean
Calculate the mean of: 8, 28, 11, 26, 23, 12, 45, 29
Answer: 22.75