Keystones — Lintel
Five GCSE retrieval questions · 27 May 2014 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.0094 in standard form
Answer: 9.4 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² + 3x - 28
Answer: (x + 7)(x - 4) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 15cm, angle = 33°. Find adjacent side. Give your answer to 2 decimal places
Answer: 12.58cm -
4. Ratio Mixed ratio problems
£205.00 is shared between A and B in the ratio 3:2. How much does A receive?
Answer: £123.00 -
5. Statistics Mean
The mean of 6 numbers is 29. If 5 of them are 15, 39, 29, 40, 34, what is the missing number?
Answer: 17