Keystones — Lintel
Five GCSE retrieval questions · 19 January 2019 · mathsvault.uk/keystones
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1. Number Converting to standard form
940000
Answer: 9.4 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² - 9x + 18
Answer: (x - 6)(x - 3) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 32cm, angle = 60°. Find adjacent side
Answer: 16cm -
4. Ratio Mixed ratio problems
Simplify: 15:12:12
Answer: 5:4:4 -
5. Statistics Mean
The mean of 6 numbers is 32. If 5 of them are 40, 37, 17, 47, 25, what is the missing number?
Answer: 26