Keystones — Lintel
Five GCSE retrieval questions · 17 November 2017 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 98,000 in standard form
Answer: 9.8 × 104 -
2. Algebra Factorising monic quadratics
Factorise: x² - 7x - 8
Answer: (x + 1)(x - 8) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 29cm, angle = 44°. Find opposite. Give your answer to 2 decimal places
Answer: 28cm -
4. Ratio Mixed ratio problems
Simplify: 20:12:20
Answer: 5:3:5 -
5. Statistics Mean
Calculate the mean of: 33, 28, 48, 38, 21, 41. Give your answer to 2 decimal places
Answer: 34.83