Keystones — Lintel
Five GCSE retrieval questions · 5 January 2015 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 550,000 in standard form
Answer: 5.5 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² - 3x - 4
Answer: (x + 1)(x - 4) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 24cm, angle = 54°. Find opposite. Give your answer to 2 decimal places
Answer: 33.03cm -
4. Ratio Mixed ratio problems
Divide 162 in the ratio 3:4:2
Answer: 54, 72 and 36 -
5. Statistics Mean
Calculate the mean of: 31, 6, 34, 42, 39, 39, 33
Answer: 32