Keystones — Lintel
Five GCSE retrieval questions · 15 November 2018 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.00034
Answer: 3.4 × 10-4 -
2. Algebra Factorising monic quadratics
Factorise: x² - 9x + 14
Answer: (x - 2)(x - 7) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 31cm, angle = 28°. Find adjacent side
Answer: 27.4cm -
4. Ratio Mixed ratio problems
Simplify: 18:6:12
Answer: 3:1:2 -
5. Statistics Mean
The mean of 6 numbers is 32. If 5 of them are 19, 37, 48, 50, 20, what is the missing number?
Answer: 18