Keystones — Lintel
Five GCSE retrieval questions · 1 September 2018 · mathsvault.uk/keystones
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1. Number Converting to standard form
120000
Answer: 1.2 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² - 9x + 14
Answer: (x - 7)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 39cm, angle = 41°. Find adjacent side
Answer: 29.4cm -
4. Ratio Mixed ratio problems
Divide 252 in the ratio 4:3:2
Answer: 112, 84 and 56 -
5. Statistics Mean
The mean of 4 numbers is 20. If 3 of them are 41, 22, 47, what is the missing number?
Answer: -30