Keystones — Lintel
Five GCSE retrieval questions · 7 March 2017 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 680,000 in standard form
Answer: 6.8 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² - x - 12
Answer: (x + 3)(x - 4) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 15cm, angle = 51°. Find opposite. Give your answer to 2 decimal places
Answer: 18.52cm -
4. Ratio Mixed ratio problems
Simplify the ratio 4 litres : 100 ml
Answer: 40:1 -
5. Statistics Mean
Calculate the mean of: 49, 8, 40, 26, 25, 12, 23, 48. Give your answer to 2 decimal places
Answer: 28.88