Keystones — Lintel
Five GCSE retrieval questions · 18 June 2016 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.069 in standard form
Answer: 6.9 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² - 4x + 4
Answer: (x - 2)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 33cm, angle = 42°. Find adjacent side. Give your answer to 2 decimal places
Answer: 24.52cm -
4. Ratio Mixed ratio problems
Simplify: 8:16:16
Answer: 1:2:2 -
5. Statistics Mean
The mean of 4 numbers is 24. If 3 of them are 18, 40, 29, what is the missing number?
Answer: 9