Keystones — Lintel
Five GCSE retrieval questions · 23 May 2016 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 310,000 in standard form
Answer: 3.1 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² - 5x - 14
Answer: (x + 2)(x - 7) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 32cm, angle = 31°. Find adjacent side. Give your answer to 2 decimal places
Answer: 27.43cm -
4. Ratio Mixed ratio problems
Simplify the ratio 4 hours : 40 minutes
Answer: 6:1 -
5. Statistics Mean
The mean of 5 numbers is 38. If 4 of them are 40, 44, 22, 25, what is the missing number?
Answer: 59