Keystones — Lintel
Five GCSE retrieval questions · 23 December 2017 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.00074 in standard form
Answer: 7.4 × 10-4 -
2. Algebra Factorising monic quadratics
Factorise: x² - 4x - 32
Answer: (x + 4)(x - 8) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 12cm, angle = 58°. Find opposite. Give your answer to 2 decimal places
Answer: 19.2cm -
4. Ratio Mixed ratio problems
Orange, purple and pink counters are in the ratio 11:8:3. What fraction of the counters are purple?
Answer: 4⁄11 -
5. Statistics Mean
Calculate the mean of: 44, 10, 19, 13, 5, 26
Answer: 19.5