Keystones — Lintel
Five GCSE retrieval questions · 2 August 2018 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.04
Answer: 4 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² + 3x - 18
Answer: (x + 6)(x - 3) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 17cm, angle = 33°. Find opposite
Answer: 11cm -
4. Ratio Mixed ratio problems
£160.00 is shared between A and B in the ratio 3:5. How much does A receive?
Answer: £60.00 -
5. Statistics Mean
The mean of 6 numbers is 22. If 5 of them are 36, 50, 20, 20, 19, what is the missing number?
Answer: -13