Keystones — Lintel
Five GCSE retrieval questions · 25 February 2014 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 86,000 in standard form
Answer: 8.6 × 104 -
2. Algebra Factorising monic quadratics
Factorise: x² - x - 2
Answer: (x + 1)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 15cm, angle = 25°. Find adjacent side. Give your answer to 2 decimal places
Answer: 13.59cm -
4. Ratio Mixed ratio problems
£170.00 is shared between A and B in the ratio 2:3. How much does A receive?
Answer: £68.00 -
5. Statistics Mean
The mean of 4 numbers is 36. If 3 of them are 42, 24, 26, what is the missing number?
Answer: 52