Keystones — Lintel
Five GCSE retrieval questions · 20 June 2016 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.0048 in standard form
Answer: 4.8 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² - 3x - 10
Answer: (x + 2)(x - 5) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 35cm, angle = 48°. Find adjacent side. Give your answer to 2 decimal places
Answer: 23.42cm -
4. Ratio Mixed ratio problems
Simplify: 15:18:12
Answer: 5:6:4 -
5. Statistics Mean
The mean of 4 numbers is 22. If 3 of them are 19, 41, 16, what is the missing number?
Answer: 12