Keystones — Lintel
Five GCSE retrieval questions · 13 November 2018 · mathsvault.uk/keystones
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1. Number Converting to standard form
120000
Answer: 1.2 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² + 3x - 4
Answer: (x + 4)(x - 1) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 26cm, angle = 30°. Find opposite
Answer: 15cm -
4. Ratio Mixed ratio problems
£120.00 is shared between A and B in the ratio 3:2. How much does A receive?
Answer: £72.00 -
5. Statistics Mean
The mean of 5 numbers is 29. If 4 of them are 16, 31, 36, 15, what is the missing number?
Answer: 47