Keystones — Lintel
Five GCSE retrieval questions · 3 November 2020 · mathsvault.uk/keystones
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1. Number Converting to standard form
1900000
Answer: 1.9 × 106 -
2. Algebra Factorising monic quadratics
Factorise: x² - 6x + 8
Answer: (x - 4)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 31cm, angle = 36°. Find adjacent side
Answer: 25.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 27, 43, 39, what is the missing number?
Answer: 47