Keystones — Lintel
Five GCSE retrieval questions · 23 January 2012 · mathsvault.uk/keystones
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1. Number Converting to standard form
660000
Answer: 6.6 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² + 5x - 6
Answer: (x + 6)(x - 1) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 20cm, angle = 59°. Find adjacent side
Answer: 10.3cm -
4. Ratio Mixed ratio problems
Simplify the ratio 5m:500cm
Answer: 1:100 -
5. Statistics Mean
The mean of 4 numbers is 28. If 3 of them are 47, 27, 17, what is the missing number?
Answer: 21