Keystones — Lintel
Five GCSE retrieval questions · 2 January 2018 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.000096 in standard form
Answer: 9.6 × 10-5 -
2. Algebra Factorising monic quadratics
Factorise: x² - 9x - 10
Answer: (x + 1)(x - 10) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 25cm, angle = 37°. Find opposite. Give your answer to 2 decimal places
Answer: 18.84cm -
4. Ratio Mixed ratio problems
Divide 72 in the ratio 1:1:4
Answer: 12, 12 and 48 -
5. Statistics Mean
Calculate the mean of: 29, 40, 33, 37, 49, 23, 11, 10
Answer: 29