Keystones — Lintel
Five GCSE retrieval questions · 17 February 2014 · mathsvault.uk/keystones
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1. Number Converting to standard form
3600000
Answer: 3.6 × 106 -
2. Algebra Factorising monic quadratics
Factorise: x² + 6x - 7
Answer: (x + 7)(x - 1) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 32cm, angle = 63°. Find adjacent side
Answer: 14.5cm -
4. Ratio Mixed ratio problems
Divide 225 in the ratio 4:4:1
Answer: 100, 100 and 25 -
5. Statistics Mean
The mean of 5 numbers is 27. If 4 of them are 32, 34, 48, 44, what is the missing number?
Answer: -23