Keystones — Lintel
Five GCSE retrieval questions · 1 May 2017 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 62,000,000 in standard form
Answer: 6.2 × 107 -
2. Algebra Factorising monic quadratics
Factorise: x² + 11x + 24
Answer: (x + 8)(x + 3) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 31cm, angle = 32°. Find adjacent side. Give your answer to 2 decimal places
Answer: 26.29cm -
4. Ratio Mixed ratio problems
Simplify the ratio 2 hours : 40 minutes
Answer: 3:1 -
5. Statistics Mean
The mean of 4 numbers is 30. If 3 of them are 22, 36, 41, what is the missing number?
Answer: 21