Keystones — Lintel
Five GCSE retrieval questions · 27 June 2012 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 3,500,000 in standard form
Answer: 3.5 × 106 -
2. Algebra Factorising monic quadratics
Factorise: x² - 16x + 60
Answer: (x - 6)(x - 10) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 12cm, angle = 31°. Find opposite. Give your answer to 2 decimal places
Answer: 7.21cm -
4. Ratio Mixed ratio problems
Divide 136 in the ratio 3:3:2
Answer: 51, 51 and 34 -
5. Statistics Mean
The mean of 5 numbers is 39. If 4 of them are 26, 44, 49, 24, what is the missing number?
Answer: 52