Keystones — Lintel
Five GCSE retrieval questions · 12 November 2015 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 920,000,000 in standard form
Answer: 9.2 × 108 -
2. Algebra Factorising monic quadratics
Factorise: x² - x - 132
Answer: (x + 11)(x - 12) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 33cm, angle = 44°. Find adjacent side. Give your answer to 2 decimal places
Answer: 23.74cm -
4. Ratio Mixed ratio problems
Divide 98 in the ratio 1:4:2
Answer: 14, 56 and 28 -
5. Statistics Mean
The mean of 4 numbers is 33. If 3 of them are 30, 23, 43, what is the missing number?
Answer: 36