Keystones — Lintel
Five GCSE retrieval questions · 25 November 2015 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 410,000 in standard form
Answer: 4.1 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² + 4x - 60
Answer: (x + 10)(x - 6) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 17cm, angle = 63°. Find adjacent side. Give your answer to 2 decimal places
Answer: 7.72cm -
4. Ratio Mixed ratio problems
Express the second part of 4:8 as a fraction in simplest form
Answer: 2⁄3 -
5. Statistics Mean
The mean of 4 numbers is 29. If 3 of them are 29, 22, 49, what is the missing number?
Answer: 16