Keystones — Lintel
Five GCSE retrieval questions · 29 June 2016 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 6,900,000 in standard form
Answer: 6.9 × 106 -
2. Algebra Factorising monic quadratics
Factorise: x² + 11x + 30
Answer: (x + 6)(x + 5) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 25cm, angle = 41°. Find opposite. Give your answer to 2 decimal places
Answer: 21.73cm -
4. Ratio Mixed ratio problems
£180.00 is shared between A and B in the ratio 2:1. How much does A receive?
Answer: £120.00 -
5. Statistics Mean
The mean of 5 numbers is 26. If 4 of them are 43, 27, 31, 21, what is the missing number?
Answer: 8