Keystones — Lintel
Five GCSE retrieval questions · 26 February 2018 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.000033 in standard form
Answer: 3.3 × 10-5 -
2. Algebra Factorising monic quadratics
Factorise: x² - 5x - 14
Answer: (x + 2)(x - 7) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 21cm, angle = 56°. Find opposite. Give your answer to 2 decimal places
Answer: 31.13cm -
4. Ratio Mixed ratio problems
Divide 154 in the ratio 2:1:4
Answer: 44, 22 and 88 -
5. Statistics Mean
Calculate the mean of: 5, 47, 23, 34, 50, 7. Give your answer to 2 decimal places
Answer: 27.67