Keystones — Lintel
Five GCSE retrieval questions · 7 November 2013 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 790,000 in standard form
Answer: 7.9 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² + x - 6
Answer: (x + 3)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 20cm, angle = 38°. Find adjacent side. Give your answer to 2 decimal places
Answer: 15.76cm -
4. Ratio Mixed ratio problems
Express the first part of 7:10 as a fraction in simplest form
Answer: 7⁄17 -
5. Statistics Mean
The mean of 4 numbers is 37. If 3 of them are 32, 31, 44, what is the missing number?
Answer: 41