Keystones — Lintel
Five GCSE retrieval questions · 27 February 2018 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 610,000 in standard form
Answer: 6.1 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² + 13x + 22
Answer: (x + 11)(x + 2) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 15cm, angle = 32°. Find adjacent side. Give your answer to 2 decimal places
Answer: 12.72cm -
4. Ratio Mixed ratio problems
Divide 232 in the ratio 3:1:4
Answer: 87, 29 and 116 -
5. Statistics Mean
The mean of 6 numbers is 38. If 5 of them are 42, 28, 29, 34, 35, what is the missing number?
Answer: 60