Keystones — Lintel
Five GCSE retrieval questions · 12 May 2016 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.039 in standard form
Answer: 3.9 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² + 5x - 6
Answer: (x + 6)(x - 1) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 14cm, angle = 39°. Find opposite. Give your answer to 2 decimal places
Answer: 11.34cm -
4. Ratio Mixed ratio problems
Divide 280 in the ratio 2:2:1
Answer: 112, 112 and 56 -
5. Statistics Mean
The mean of 4 numbers is 26. If 3 of them are 19, 33, 33, what is the missing number?
Answer: 19