Keystones — Lintel
Five GCSE retrieval questions · 20 May 2010 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 380,000 in standard form
Answer: 3.8 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² + 20x + 96
Answer: (x + 12)(x + 8) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 11cm, angle = 37°. Find opposite. Give your answer to 2 decimal places
Answer: 8.29cm -
4. Ratio Mixed ratio problems
£248.00 is shared between A and B in the ratio 5:3. How much does A receive?
Answer: £155.00 -
5. Statistics Mean
The mean of 4 numbers is 29. If 3 of them are 26, 16, 23, what is the missing number?
Answer: 51