Keystones — Lintel
Five GCSE retrieval questions · 23 June 2018 · mathsvault.uk/keystones
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1. Number Converting to standard form
94000000
Answer: 9.4 × 107 -
2. Algebra Factorising monic quadratics
Factorise: x² + 7x - 8
Answer: (x + 8)(x - 1) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 39cm, angle = 45°. Find adjacent side
Answer: 27.6cm -
4. Ratio Mixed ratio problems
Divide 90 in the ratio 1:2:2
Answer: 18, 36 and 36 -
5. Statistics Mean
The mean of 6 numbers is 33. If 5 of them are 38, 42, 26, 39, 19, what is the missing number?
Answer: 34