Keystones — Lintel
Five GCSE retrieval questions · 9 May 2012 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 9,400,000 in standard form
Answer: 9.4 × 106 -
2. Algebra Factorising monic quadratics
Factorise: x² + x - 12
Answer: (x + 4)(x - 3) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 28cm, angle = 35°. Find opposite. Give your answer to 2 decimal places
Answer: 19.61cm -
4. Ratio Mixed ratio problems
£125.00 is shared between A and B in the ratio 2:3. How much does A receive?
Answer: £50.00 -
5. Statistics Mean
The mean of 5 numbers is 35. If 4 of them are 50, 47, 21, 37, what is the missing number?
Answer: 20