Keystones — Lintel
Five GCSE retrieval questions · 12 March 2014 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 510,000 in standard form
Answer: 5.1 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² + 5x - 6
Answer: (x + 6)(x - 1) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 30cm, angle = 28°. Find adjacent side. Give your answer to 2 decimal places
Answer: 26.49cm -
4. Ratio Mixed ratio problems
Simplify: 16:16:8
Answer: 2:2:1 -
5. Statistics Mean
The mean of 4 numbers is 27. If 3 of them are 15, 32, 18, what is the missing number?
Answer: 43