Keystones — Lintel
Five GCSE retrieval questions · 7 December 2014 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 390,000 in standard form
Answer: 3.9 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² - 14x + 33
Answer: (x - 3)(x - 11) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 22cm, angle = 48°. Find opposite. Give your answer to 2 decimal places
Answer: 24.43cm -
4. Ratio Mixed ratio problems
£210.00 is shared between A and B in the ratio 2:5. How much does A receive?
Answer: £60.00 -
5. Statistics Mean
The mean of 6 numbers is 26. If 5 of them are 30, 26, 20, 18, 33, what is the missing number?
Answer: 29