Keystones — Lintel
Five GCSE retrieval questions · 13 February 2016 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.0046 in standard form
Answer: 4.6 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² + 2x - 35
Answer: (x + 7)(x - 5) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 22cm, angle = 58°. Find adjacent side. Give your answer to 2 decimal places
Answer: 11.66cm -
4. Ratio Mixed ratio problems
Simplify: 12:12:18
Answer: 2:2:3 -
5. Statistics Mean
The mean of 5 numbers is 27. If 4 of them are 26, 40, 16, 39, what is the missing number?
Answer: 14