Keystones — Lintel
Five GCSE retrieval questions · 31 August 2017 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.000056 in standard form
Answer: 5.6 × 10-5 -
2. Algebra Factorising monic quadratics
Factorise: x² - x - 90
Answer: (x + 9)(x - 10) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 24cm, angle = 43°. Find opposite. Give your answer to 2 decimal places
Answer: 22.38cm -
4. Ratio Mixed ratio problems
Simplify: 4:8:12
Answer: 1:2:3 -
5. Statistics Mean
Calculate the mean of: 41, 15, 15, 27, 22, 37, 26, 49
Answer: 29