Keystones — Lintel
Five GCSE retrieval questions · 21 July 2014 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 660,000,000 in standard form
Answer: 6.6 × 108 -
2. Algebra Factorising monic quadratics
Factorise: x² - x - 6
Answer: (x + 2)(x - 3) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 19cm, angle = 44°. Find adjacent side. Give your answer to 2 decimal places
Answer: 13.67cm -
4. Ratio Mixed ratio problems
Divide 105 in the ratio 3:3:1
Answer: 45, 45 and 15 -
5. Statistics Mean
The mean of 4 numbers is 37. If 3 of them are 36, 32, 48, what is the missing number?
Answer: 32