Keystones — Lintel
Five GCSE retrieval questions · 12 September 2013 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 120,000,000 in standard form
Answer: 1.2 × 108 -
2. Algebra Factorising monic quadratics
Factorise: x² + x - 110
Answer: (x + 11)(x - 10) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 17cm, angle = 53°. Find opposite. Give your answer to 2 decimal places
Answer: 22.56cm -
4. Ratio Mixed ratio problems
Express the first part of 5:11 as a fraction in simplest form
Answer: 5⁄16 -
5. Statistics Mean
Calculate the mean of: 5, 25, 44, 49, 30, 8, 41, 18
Answer: 27.5