Keystones — Lintel
Five GCSE retrieval questions · 13 July 2014 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 220,000 in standard form
Answer: 2.2 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² + 5x - 14
Answer: (x + 7)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 40cm, angle = 65°. Find adjacent side. Give your answer to 2 decimal places
Answer: 16.9cm -
4. Ratio Mixed ratio problems
£243.00 is shared between A and B in the ratio 4:5. How much does A receive?
Answer: £108.00 -
5. Statistics Mean
The mean of 4 numbers is 33. If 3 of them are 41, 22, 19, what is the missing number?
Answer: 50