Keystones — Lintel
Five GCSE retrieval questions · 24 October 2016 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 6,200,000 in standard form
Answer: 6.2 × 106 -
2. Algebra Factorising monic quadratics
Factorise: x² + 2x - 35
Answer: (x + 7)(x - 5) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 25cm, angle = 55°. Find adjacent side. Give your answer to 2 decimal places
Answer: 14.34cm -
4. Ratio Mixed ratio problems
Express the second part of 2:4 as a fraction in simplest form
Answer: 2⁄3 -
5. Statistics Mean
The mean of 5 numbers is 34. If 4 of them are 21, 27, 19, 36, what is the missing number?
Answer: 67