Keystones — Lintel
Five GCSE retrieval questions · 31 December 2010 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 730,000 in standard form
Answer: 7.3 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² - 5x - 14
Answer: (x + 2)(x - 7) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 12cm, angle = 33°. Find opposite. Give your answer to 2 decimal places
Answer: 7.79cm -
4. Ratio Mixed ratio problems
Divide 52 in the ratio 2:1:1
Answer: 26, 13 and 13 -
5. Statistics Mean
The mean of 6 numbers is 36. If 5 of them are 42, 45, 27, 43, 23, what is the missing number?
Answer: 36