Keystones — Lintel
Five GCSE retrieval questions · 18 November 2017 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 70,000 in standard form
Answer: 7 × 104 -
2. Algebra Factorising monic quadratics
Factorise: x² - 2x - 48
Answer: (x + 6)(x - 8) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 25cm, angle = 43°. Find opposite. Give your answer to 2 decimal places
Answer: 23.31cm -
4. Ratio Mixed ratio problems
Divide 180 in the ratio 3:2:4
Answer: 60, 40 and 80 -
5. Statistics Mean
Calculate the mean of: 19, 17, 25, 21, 16, 41, 42, 11
Answer: 24