Keystones — Lintel
Five GCSE retrieval questions · 23 June 2016 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 380,000 in standard form
Answer: 3.8 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² + 3x - 70
Answer: (x + 10)(x - 7) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 11cm, angle = 50°. Find opposite. Give your answer to 2 decimal places
Answer: 13.11cm -
4. Ratio Mixed ratio problems
Express the first part of 12:4 as a fraction in simplest form
Answer: 3⁄4 -
5. Statistics Mean
The mean of 6 numbers is 29. If 5 of them are 19, 28, 24, 26, 16, what is the missing number?
Answer: 61