Keystones — Lintel
Five GCSE retrieval questions · 22 June 2012 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 63,000 in standard form
Answer: 6.3 × 104 -
2. Algebra Factorising monic quadratics
Factorise: x² - 6x - 16
Answer: (x + 2)(x - 8) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 10cm, angle = 45°. Find opposite
Answer: 10cm -
4. Ratio Mixed ratio problems
£350.00 is shared between A and B in the ratio 5:2. How much does A receive?
Answer: £250.00 -
5. Statistics Mean
The mean of 5 numbers is 34. If 4 of them are 31, 15, 19, 35, what is the missing number?
Answer: 70