Keystones — Lintel
Five GCSE retrieval questions · 10 October 2018 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.0068
Answer: 6.8 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² - 9x + 14
Answer: (x - 2)(x - 7) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 27cm, angle = 46°. Find adjacent side
Answer: 18.8cm -
4. Ratio Mixed ratio problems
Divide 108 in the ratio 1:2:1
Answer: 27, 54 and 27 -
5. Statistics Mean
The mean of 6 numbers is 29. If 5 of them are 34, 35, 47, 32, 34, what is the missing number?
Answer: -8