Keystones — Lintel
Five GCSE retrieval questions · 23 April 2016 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 740,000 in standard form
Answer: 7.4 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² + 20x + 96
Answer: (x + 12)(x + 8) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 23cm, angle = 63°. Find adjacent side. Give your answer to 2 decimal places
Answer: 10.44cm -
4. Ratio Mixed ratio problems
Divide 75 in the ratio 1:2:2
Answer: 15, 30 and 30 -
5. Statistics Mean
The mean of 6 numbers is 28. If 5 of them are 16, 16, 42, 35, 36, what is the missing number?
Answer: 23