Keystones — Lintel
Five GCSE retrieval questions · 11 August 2019 · mathsvault.uk/keystones
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1. Number Converting to standard form
930000
Answer: 9.3 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² - 9x + 14
Answer: (x - 2)(x - 7) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 35cm, angle = 51°. Find adjacent side
Answer: 22cm -
4. Ratio Mixed ratio problems
Divide 110 in the ratio 4:3:4
Answer: 40, 30 and 40 -
5. Statistics Mean
The mean of 4 numbers is 25. If 3 of them are 49, 18, 31, what is the missing number?
Answer: 2