Keystones — Lintel
Five GCSE retrieval questions · 3 September 2014 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 580,000 in standard form
Answer: 5.8 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² - 2x - 15
Answer: (x + 3)(x - 5) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 28cm, angle = 42°. Find adjacent side. Give your answer to 2 decimal places
Answer: 20.81cm -
4. Ratio Mixed ratio problems
£154.00 is shared between A and B in the ratio 4:3. How much does A receive?
Answer: £88.00 -
5. Statistics Mean
The mean of 4 numbers is 36. If 3 of them are 17, 48, 42, what is the missing number?
Answer: 37