Keystones — Lintel
Five GCSE retrieval questions · 21 November 2016 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 34,000,000 in standard form
Answer: 3.4 × 107 -
2. Algebra Factorising monic quadratics
Factorise: x² + 4x - 60
Answer: (x + 10)(x - 6) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 36cm, angle = 40°. Find adjacent side. Give your answer to 2 decimal places
Answer: 27.58cm -
4. Ratio Mixed ratio problems
Simplify: 12:18:9
Answer: 4:6:3 -
5. Statistics Mean
The mean of 5 numbers is 27. If 4 of them are 38, 23, 34, 18, what is the missing number?
Answer: 22