Keystones — Lintel
Five GCSE retrieval questions · 11 December 2014 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 70,000 in standard form
Answer: 7 × 104 -
2. Algebra Factorising monic quadratics
Factorise: x² - 2x - 48
Answer: (x + 6)(x - 8) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 28cm, angle = 38°. Find adjacent side. Give your answer to 2 decimal places
Answer: 22.06cm -
4. Ratio Mixed ratio problems
£175.00 is shared between A and B in the ratio 5:2. How much does A receive?
Answer: £125.00 -
5. Statistics Mean
The mean of 5 numbers is 32. If 4 of them are 18, 17, 39, 31, what is the missing number?
Answer: 55