Keystones — Lintel
Five GCSE retrieval questions · 12 February 2016 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 140,000,000 in standard form
Answer: 1.4 × 108 -
2. Algebra Factorising monic quadratics
Factorise: x² - 22x + 121
Answer: (x - 11)(x - 11) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 10cm, angle = 39°. Find opposite. Give your answer to 2 decimal places
Answer: 8.cm -
4. Ratio Mixed ratio problems
Divide 115 in the ratio 2:2:1
Answer: 46, 46 and 23 -
5. Statistics Mean
Calculate the mean of: 15, 45, 14, 30, 44, 37. Give your answer to 2 decimal places
Answer: 30.83