Keystones — Lintel
Five GCSE retrieval questions · 23 December 2014 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 700,000,000 in standard form
Answer: 7 × 108 -
2. Algebra Factorising monic quadratics
Factorise: x² - 10x + 24
Answer: (x - 4)(x - 6) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 36cm, angle = 50°. Find adjacent side. Give your answer to 2 decimal places
Answer: 23.14cm -
4. Ratio Mixed ratio problems
Express the second part of 13:4 as a fraction in simplest form
Answer: 4⁄17 -
5. Statistics Mean
The mean of 4 numbers is 33. If 3 of them are 17, 38, 35, what is the missing number?
Answer: 42