Keystones — Lintel
Five GCSE retrieval questions · 2 April 2018 · mathsvault.uk/keystones
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1. Number Converting to standard form
49000
Answer: 4.9 × 104 -
2. Algebra Factorising monic quadratics
Factorise: x² + 3x - 4
Answer: (x + 4)(x - 1) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 27cm, angle = 48°. Find adjacent side
Answer: 18.cm -
4. Ratio Mixed ratio problems
Divide 270 in the ratio 2:1:2
Answer: 108, 54 and 108 -
5. Statistics Mean
The mean of 4 numbers is 28. If 3 of them are 44, 24, 27, what is the missing number?
Answer: 17