Keystones — Lintel
Five GCSE retrieval questions · 7 February 2014 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.086 in standard form
Answer: 8.6 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² - 8x + 12
Answer: (x - 2)(x - 6) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 32cm, angle = 37°. Find adjacent side. Give your answer to 2 decimal places
Answer: 25.56cm -
4. Ratio Mixed ratio problems
Simplify the ratio £6 : 60p
Answer: 10:1 -
5. Statistics Mean
The mean of 4 numbers is 33. If 3 of them are 33, 26, 24, what is the missing number?
Answer: 49