Keystones — Lintel
Five GCSE retrieval questions · 16 December 2011 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 91,000 in standard form
Answer: 9.1 × 104 -
2. Algebra Factorising monic quadratics
Factorise: x² - 3x - 70
Answer: (x + 7)(x - 10) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 14cm, angle = 48°. Find opposite. Give your answer to 2 decimal places
Answer: 15.55cm -
4. Ratio Mixed ratio problems
£315.00 is shared between A and B in the ratio 4:5. How much does A receive?
Answer: £140.00 -
5. Statistics Mean
The mean of 4 numbers is 35. If 3 of them are 28, 25, 41, what is the missing number?
Answer: 46