Keystones — Lintel
Five GCSE retrieval questions · 4 September 2018 · mathsvault.uk/keystones
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1. Number Converting to standard form
2900000
Answer: 2.9 × 106 -
2. Algebra Factorising monic quadratics
Factorise: x² + 4x - 21
Answer: (x + 7)(x - 3) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 30cm, angle = 25°. Find adjacent side
Answer: 27.2cm -
4. Ratio Mixed ratio problems
Simplify the ratio 6m:600cm
Answer: 1:100 -
5. Statistics Mean
The mean of 6 numbers is 24. If 5 of them are 50, 48, 33, 33, 26, what is the missing number?
Answer: -46