Keystones — Lintel
Five GCSE retrieval questions · 16 July 2013 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 90,000 in standard form
Answer: 9 × 104 -
2. Algebra Factorising monic quadratics
Factorise: x² + 5x - 6
Answer: (x + 6)(x - 1) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 35cm, angle = 44°. Find adjacent side. Give your answer to 2 decimal places
Answer: 25.18cm -
4. Ratio Mixed ratio problems
Divide 72 in the ratio 3:2:1
Answer: 36, 24 and 12 -
5. Statistics Mean
The mean of 4 numbers is 33. If 3 of them are 21, 39, 48, what is the missing number?
Answer: 24