Keystones — Lintel
Five GCSE retrieval questions · 9 September 2014 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 39,000 in standard form
Answer: 3.9 × 104 -
2. Algebra Factorising monic quadratics
Factorise: x² - 12x + 11
Answer: (x - 1)(x - 11) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 29cm, angle = 54°. Find adjacent side. Give your answer to 2 decimal places
Answer: 17.05cm -
4. Ratio Mixed ratio problems
Express the second part of 6:14 as a fraction in simplest form
Answer: 7⁄10 -
5. Statistics Mean
The mean of 5 numbers is 39. If 4 of them are 38, 40, 40, 16, what is the missing number?
Answer: 61