Keystones — Lintel
Five GCSE retrieval questions · 23 February 2013 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.034 in standard form
Answer: 3.4 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² - 3x - 4
Answer: (x + 1)(x - 4) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 26cm, angle = 54°. Find opposite. Give your answer to 2 decimal places
Answer: 35.79cm -
4. Ratio Mixed ratio problems
Divide 216 in the ratio 4:1:4
Answer: 96, 24 and 96 -
5. Statistics Mean
The mean of 6 numbers is 39. If 5 of them are 44, 25, 33, 47, 44, what is the missing number?
Answer: 41