Keystones — Lintel
Five GCSE retrieval questions · 24 June 2015 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.04 in standard form
Answer: 4 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² - 2x - 80
Answer: (x + 8)(x - 10) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 33cm, angle = 46°. Find adjacent side. Give your answer to 2 decimal places
Answer: 22.92cm -
4. Ratio Mixed ratio problems
Simplify: 9:12:6
Answer: 3:4:2 -
5. Statistics Mean
The mean of 5 numbers is 36. If 4 of them are 28, 43, 33, 40, what is the missing number?
Answer: 36