Keystones — Lintel
Five GCSE retrieval questions · 15 May 2015 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 11,000 in standard form
Answer: 1.1 × 104 -
2. Algebra Factorising monic quadratics
Factorise: x² + 4x - 60
Answer: (x + 10)(x - 6) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 16cm, angle = 43°. Find adjacent side. Give your answer to 2 decimal places
Answer: 11.7cm -
4. Ratio Mixed ratio problems
Express the first part of 14:13 as a fraction in simplest form
Answer: 14⁄27 -
5. Statistics Mean
The mean of 5 numbers is 27. If 4 of them are 21, 16, 17, 19, what is the missing number?
Answer: 62