Keystones — Lintel
Five GCSE retrieval questions · 25 May 2018 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.059
Answer: 5.9 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² - 10x + 24
Answer: (x - 4)(x - 6) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 40cm, angle = 60°. Find adjacent side
Answer: 20cm -
4. Ratio Mixed ratio problems
Divide 120 in the ratio 2:1:1
Answer: 60, 30 and 30 -
5. Statistics Mean
The mean of 6 numbers is 22. If 5 of them are 48, 25, 21, 18, 38, what is the missing number?
Answer: -18