Keystones — Lintel
Five GCSE retrieval questions · 12 February 2014 · 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 - 19x + 88
Answer: (x - 8)(x - 11) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 40cm, angle = 36°. Find adjacent side. Give your answer to 2 decimal places
Answer: 32.36cm -
4. Ratio Mixed ratio problems
In ratio 2:8:2, what fraction is the second part?
Answer: 2⁄3 -
5. Statistics Mean
The mean of 5 numbers is 35. If 4 of them are 50, 17, 24, 26, what is the missing number?
Answer: 58