Keystones — Lintel
Five GCSE retrieval questions · 27 November 2018 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.037
Answer: 3.7 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² - 14x + 49
Answer: (x - 7)(x - 7) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 23cm, angle = 64°. Find adjacent side
Answer: 10.cm -
4. Ratio Mixed ratio problems
Simplify the ratio 5m:500cm
Answer: 1:100 -
5. Statistics Mean
The mean of 4 numbers is 39. If 3 of them are 26, 33, 15, what is the missing number?
Answer: 82