Keystones — Lintel
Five GCSE retrieval questions · 12 October 2017 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 40,000,000 in standard form
Answer: 4 × 107 -
2. Algebra Factorising monic quadratics
Factorise: x² - 4x - 32
Answer: (x + 4)(x - 8) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 27cm, angle = 56°. Find opposite. Give your answer to 2 decimal places
Answer: 40.03cm -
4. Ratio Mixed ratio problems
Express the second part of 10:13 as a fraction in simplest form
Answer: 13⁄23 -
5. Statistics Mean
Calculate the mean of: 10, 21, 40, 14, 15, 7. Give your answer to 2 decimal places
Answer: 17.83