Keystones — Lintel
Five GCSE retrieval questions · 3 September 2013 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 650,000,000 in standard form
Answer: 6.5 × 108 -
2. Algebra Factorising monic quadratics
Factorise: x² - 7x + 10
Answer: (x - 2)(x - 5) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 16cm, angle = 37°. Find adjacent side. Give your answer to 2 decimal places
Answer: 12.78cm -
4. Ratio Mixed ratio problems
Simplify the ratio m : 85cm
Answer: 20:17 -
5. Statistics Mean
The mean of 6 numbers is 34. If 5 of them are 19, 47, 27, 27, 43, what is the missing number?
Answer: 41