Keystones — Lintel
Five GCSE retrieval questions · 6 November 2010 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 26,000,000 in standard form
Answer: 2.6 × 107 -
2. Algebra Factorising monic quadratics
Factorise: x² - 16x + 63
Answer: (x - 7)(x - 9) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 17cm, angle = 30°. Find adjacent side. Give your answer to 2 decimal places
Answer: 14.72cm -
4. Ratio Mixed ratio problems
£294.00 is shared between A and B in the ratio 4:3. How much does A receive?
Answer: £168.00 -
5. Statistics Mean
The mean of 4 numbers is 31. If 3 of them are 43, 24, 30, what is the missing number?
Answer: 27