Keystones — Lintel
Five GCSE retrieval questions · 22 February 2018 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 3,700,000 in standard form
Answer: 3.7 × 106 -
2. Algebra Factorising monic quadratics
Factorise: x² - 2x - 80
Answer: (x + 8)(x - 10) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 26cm, angle = 60°. Find adjacent side
Answer: 13cm -
4. Ratio Mixed ratio problems
Simplify the ratio 6m : 95cm
Answer: 120:19 -
5. Statistics Mean
The mean of 5 numbers is 37. If 4 of them are 30, 37, 40, 19, what is the missing number?
Answer: 59