Keystones — Lintel
Five GCSE retrieval questions · 5 May 2013 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 91,000,000 in standard form
Answer: 9.1 × 107 -
2. Algebra Factorising monic quadratics
Factorise: x² - x - 6
Answer: (x + 2)(x - 3) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 38cm, angle = 33°. Find adjacent side. Give your answer to 2 decimal places
Answer: 31.87cm -
4. Ratio Mixed ratio problems
Simplify the ratio 3 litres : 750 ml
Answer: 4:1 -
5. Statistics Mean
The mean of 6 numbers is 30. If 5 of them are 18, 46, 37, 44, 19, what is the missing number?
Answer: 16