Keystones — Lintel
Five GCSE retrieval questions · 10 September 2014 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 240,000 in standard form
Answer: 2.4 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² + 7x + 10
Answer: (x + 5)(x + 2) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 22cm, angle = 37°. Find opposite. Give your answer to 2 decimal places
Answer: 16.58cm -
4. Ratio Mixed ratio problems
Divide 88 in the ratio 1:2:1
Answer: 22, 44 and 22 -
5. Statistics Mean
The mean of 4 numbers is 31. If 3 of them are 46, 32, 32, what is the missing number?
Answer: 14