Keystones — Lintel
Five GCSE retrieval questions · 20 April 2018 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.014
Answer: 1.4 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² - 4x + 4
Answer: (x - 2)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 37cm, angle = 30°. Find adjacent side
Answer: 32cm -
4. Ratio Mixed ratio problems
Divide 132 in the ratio 2:1:3
Answer: 44, 22 and 66 -
5. Statistics Mean
The mean of 4 numbers is 33. If 3 of them are 34, 25, 19, what is the missing number?
Answer: 54