Keystones — Lintel
Five GCSE retrieval questions · 27 June 2015 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 790,000 in standard form
Answer: 7.9 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² + 16x + 48
Answer: (x + 12)(x + 4) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 29cm, angle = 59°. Find opposite. Give your answer to 2 decimal places
Answer: 48.26cm -
4. Ratio Mixed ratio problems
Divide 210 in the ratio 3:3:4
Answer: 63, 63 and 84 -
5. Statistics Mean
The mean of 4 numbers is 37. If 3 of them are 38, 38, 31, what is the missing number?
Answer: 41