Keystones — Lintel
Five GCSE retrieval questions · 20 January 2015 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.0019 in standard form
Answer: 1.9 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² - 15x + 44
Answer: (x - 4)(x - 11) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 11cm, angle = 45°. Find opposite
Answer: 11cm -
4. Ratio Mixed ratio problems
£180.00 is shared between A and B in the ratio 5:4. How much does A receive?
Answer: £100.00 -
5. Statistics Mean
The mean of 4 numbers is 29. If 3 of them are 22, 22, 23, what is the missing number?
Answer: 49