Keystones — Lintel
Five GCSE retrieval questions · 13 August 2015 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 990,000,000 in standard form
Answer: 9.9 × 108 -
2. Algebra Factorising monic quadratics
Factorise: x² + 3x - 28
Answer: (x + 7)(x - 4) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 24cm, angle = 37°. Find adjacent side. Give your answer to 2 decimal places
Answer: 19.17cm -
4. Ratio Mixed ratio problems
£350.00 is shared between A and B in the ratio 2:5. How much does A receive?
Answer: £100.00 -
5. Statistics Mean
The mean of 4 numbers is 31. If 3 of them are 23, 47, 19, what is the missing number?
Answer: 35