Keystones — Lintel
Five GCSE retrieval questions · 30 December 2013 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 240,000,000 in standard form
Answer: 2.4 × 108 -
2. Algebra Factorising monic quadratics
Factorise: x² - x - 42
Answer: (x + 6)(x - 7) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 30cm, angle = 45°. Find opposite
Answer: 30cm -
4. Ratio Mixed ratio problems
£252.00 is shared between A and B in the ratio 2:1. How much does A receive?
Answer: £168.00 -
5. Statistics Mean
The mean of 5 numbers is 29. If 4 of them are 46, 20, 40, 23, what is the missing number?
Answer: 16