Keystones — Lintel
Five GCSE retrieval questions · 15 December 2020 · mathsvault.uk/keystones
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1. Number Converting to standard form
7600000
Answer: 7.6 × 106 -
2. Algebra Factorising monic quadratics
Factorise: x² - 7x + 12
Answer: (x - 3)(x - 4) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 39cm, angle = 37°. Find adjacent side
Answer: 31.cm -
4. Ratio Mixed ratio problems
Divide 162 in the ratio 4:3:2
Answer: 72, 54 and 36 -
5. Statistics Mean
The mean of 4 numbers is 22. If 3 of them are 39, 18, 40, what is the missing number?
Answer: -9