Keystones — Lintel
Five GCSE retrieval questions · 23 July 2010 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.0058 in standard form
Answer: 5.8 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² - x - 2
Answer: (x + 1)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 23cm, angle = 53°. Find opposite. Give your answer to 2 decimal places
Answer: 30.52cm -
4. Ratio Mixed ratio problems
Simplify the ratio 5 litres : 50 ml
Answer: 100:1 -
5. Statistics Mean
The mean of 6 numbers is 29. If 5 of them are 48, 32, 36, 20, 32, what is the missing number?
Answer: 6