Keystones — Lintel
Five GCSE retrieval questions · 10 January 2016 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 78,000,000 in standard form
Answer: 7.8 × 107 -
2. Algebra Factorising monic quadratics
Factorise: x² + 4x - 60
Answer: (x + 10)(x - 6) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 40cm, angle = 48°. Find adjacent side. Give your answer to 2 decimal places
Answer: 26.77cm -
4. Ratio Mixed ratio problems
£400.00 is shared between A and B in the ratio 3:5. How much does A receive?
Answer: £150.00 -
5. Statistics Mean
The mean of 5 numbers is 33. If 4 of them are 49, 45, 17, 46, what is the missing number?
Answer: 8