Keystones — Lintel
Five GCSE retrieval questions · 27 July 2012 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 6,700,000 in standard form
Answer: 6.7 × 106 -
2. Algebra Factorising monic quadratics
Factorise: x² + 8x - 20
Answer: (x + 10)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 25cm, angle = 56°. Find opposite. Give your answer to 2 decimal places
Answer: 37.06cm -
4. Ratio Mixed ratio problems
£196.00 is shared between A and B in the ratio 4:3. How much does A receive?
Answer: £112.00 -
5. Statistics Mean
The mean of 5 numbers is 38. If 4 of them are 33, 22, 36, 32, what is the missing number?
Answer: 67