Keystones — Lintel
Five GCSE retrieval questions · 27 January 2016 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 720,000 in standard form
Answer: 7.2 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² - 2x - 15
Answer: (x + 3)(x - 5) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 22cm, angle = 64°. Find adjacent side. Give your answer to 2 decimal places
Answer: 9.64cm -
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 6 numbers is 32. If 5 of them are 33, 46, 37, 38, 25, what is the missing number?
Answer: 13