Keystones — Lintel
Five GCSE retrieval questions · 14 April 2014 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 7,300,000 in standard form
Answer: 7.3 × 106 -
2. Algebra Factorising monic quadratics
Factorise: x² - x - 56
Answer: (x + 7)(x - 8) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 11cm, angle = 56°. Find opposite. Give your answer to 2 decimal places
Answer: 16.31cm -
4. Ratio Mixed ratio problems
Black, white and yellow counters are in the ratio 11:9:6. What fraction of the counters are yellow?
Answer: 3⁄13 -
5. Statistics Mean
Calculate the mean of: 21, 31, 14, 21, 31, 34, 35, 19
Answer: 25.75