Keystones — Lintel
Five GCSE retrieval questions · 19 November 2011 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 260,000 in standard form
Answer: 2.6 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² + 5x - 36
Answer: (x + 9)(x - 4) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 29cm, angle = 37°. Find adjacent side. Give your answer to 2 decimal places
Answer: 23.16cm -
4. Ratio Mixed ratio problems
Divide 102 in the ratio 4:1:1
Answer: 68, 17 and 17 -
5. Statistics Mean
The mean of 5 numbers is 33. If 4 of them are 15, 26, 49, 47, what is the missing number?
Answer: 28