Keystones — Lintel
Five GCSE retrieval questions · 20 June 2010 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 56,000 in standard form
Answer: 5.6 × 104 -
2. Algebra Factorising monic quadratics
Factorise: x² + 2x - 99
Answer: (x + 11)(x - 9) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 22cm, angle = 41°. Find adjacent side. Give your answer to 2 decimal places
Answer: 16.6cm -
4. Ratio Mixed ratio problems
Divide 207 in the ratio 4:2:3
Answer: 92, 46 and 69 -
5. Statistics Mean
The mean of 6 numbers is 28. If 5 of them are 24, 45, 34, 31, 20, what is the missing number?
Answer: 14