Keystones — Lintel
Five GCSE retrieval questions · 27 December 2017 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 61,000,000 in standard form
Answer: 6.1 × 107 -
2. Algebra Factorising monic quadratics
Factorise: x² - 17x + 60
Answer: (x - 5)(x - 12) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 30cm, angle = 56°. Find adjacent side. Give your answer to 2 decimal places
Answer: 16.78cm -
4. Ratio Mixed ratio problems
Express the second part of 4:6 as a fraction in simplest form
Answer: 3⁄5 -
5. Statistics Mean
The mean of 6 numbers is 30. If 5 of them are 16, 32, 37, 28, 16, what is the missing number?
Answer: 51