Keystones — Lintel
Five GCSE retrieval questions · 14 January 2015 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 760,000 in standard form
Answer: 7.6 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² + 6x - 40
Answer: (x + 10)(x - 4) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 29cm, angle = 63°. Find adjacent side. Give your answer to 2 decimal places
Answer: 13.17cm -
4. Ratio Mixed ratio problems
£280.00 is shared between A and B in the ratio 3:4. How much does A receive?
Answer: £120.00 -
5. Statistics Mean
The mean of 6 numbers is 31. If 5 of them are 22, 17, 28, 32, 27, what is the missing number?
Answer: 60