Keystones — Lintel
Five GCSE retrieval questions · 10 April 2013 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.086 in standard form
Answer: 8.6 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² + 5x + 6
Answer: (x + 3)(x + 2) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 34cm, angle = 29°. Find adjacent side. Give your answer to 2 decimal places
Answer: 29.74cm -
4. Ratio Mixed ratio problems
Divide 144 in the ratio 2:1:1
Answer: 72, 36 and 36 -
5. Statistics Mean
The mean of 5 numbers is 40. If 4 of them are 33, 36, 44, 43, what is the missing number?
Answer: 44