Keystones — Lintel
Five GCSE retrieval questions · 8 April 2016 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 360,000,000 in standard form
Answer: 3.6 × 108 -
2. Algebra Factorising monic quadratics
Factorise: x² + 19x + 88
Answer: (x + 11)(x + 8) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 29cm, angle = 43°. Find opposite. Give your answer to 2 decimal places
Answer: 27.04cm -
4. Ratio Mixed ratio problems
£252.00 is shared between A and B in the ratio 4:3. How much does A receive?
Answer: £144.00 -
5. Statistics Mean
The mean of 6 numbers is 33. If 5 of them are 48, 38, 25, 37, 24, what is the missing number?
Answer: 26