Keystones — Lintel
Five GCSE retrieval questions · 25 January 2011 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 830,000,000 in standard form
Answer: 8.3 × 108 -
2. Algebra Factorising monic quadratics
Factorise: x² + 6x - 55
Answer: (x + 11)(x - 5) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 38cm, angle = 57°. Find adjacent side. Give your answer to 2 decimal places
Answer: 20.7cm -
4. Ratio Mixed ratio problems
Simplify the ratio 6kg : 850g
Answer: 120:17 -
5. Statistics Mean
Calculate the mean of: 43, 31, 10, 6, 44, 9, 11, 14
Answer: 21