Keystones — Lintel
Five GCSE retrieval questions · 15 October 2016 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.0085 in standard form
Answer: 8.5 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² + x - 12
Answer: (x + 4)(x - 3) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 16cm, angle = 30°. Find opposite. Give your answer to 2 decimal places
Answer: 9.24cm -
4. Ratio Mixed ratio problems
£264.00 is shared between A and B in the ratio 1:2. How much does A receive?
Answer: £88.00 -
5. Statistics Mean
The mean of 4 numbers is 31. If 3 of them are 25, 19, 22, what is the missing number?
Answer: 58