Keystones — Lintel
Five GCSE retrieval questions · 30 September 2010 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 910,000,000 in standard form
Answer: 9.1 × 108 -
2. Algebra Factorising monic quadratics
Factorise: x² - 5x - 6
Answer: (x + 1)(x - 6) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 15cm, angle = 35°. Find adjacent side. Give your answer to 2 decimal places
Answer: 12.29cm -
4. Ratio Mixed ratio problems
£350.00 is shared between A and B in the ratio 4:3. How much does A receive?
Answer: £200.00 -
5. Statistics Mean
The mean of 5 numbers is 23. If 4 of them are 16, 16, 19, 16, what is the missing number?
Answer: 48