Keystones — Lintel
Five GCSE retrieval questions · 9 January 2018 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 94,000,000 in standard form
Answer: 9.4 × 107 -
2. Algebra Factorising monic quadratics
Factorise: x² - x - 2
Answer: (x + 1)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 25cm, angle = 62°. Find adjacent side. Give your answer to 2 decimal places
Answer: 11.74cm -
4. Ratio Mixed ratio problems
In ratio 12:12:5, what fraction is the third part?
Answer: 5⁄29 -
5. Statistics Mean
The mean of 4 numbers is 29. If 3 of them are 47, 15, 45, what is the missing number?
Answer: 9