Keystones — Lintel
Five GCSE retrieval questions · 26 May 2016 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 200,000,000 in standard form
Answer: 2 × 108 -
2. Algebra Factorising monic quadratics
Factorise: x² - 6x - 7
Answer: (x + 1)(x - 7) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 34cm, angle = 29°. Find adjacent side. Give your answer to 2 decimal places
Answer: 29.74cm -
4. Ratio Mixed ratio problems
Divide 91 in the ratio 4:2:1
Answer: 52, 26 and 13 -
5. Statistics Mean
The mean of 4 numbers is 20. If 3 of them are 22, 24, 26, what is the missing number?
Answer: 8