Keystones — Lintel
Five GCSE retrieval questions · 27 December 2010 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 13,000 in standard form
Answer: 1.3 × 104 -
2. Algebra Factorising monic quadratics
Factorise: x² - 3x - 10
Answer: (x + 2)(x - 5) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 29cm, angle = 32°. Find adjacent side. Give your answer to 2 decimal places
Answer: 24.59cm -
4. Ratio Mixed ratio problems
Divide 280 in the ratio 3:4:3
Answer: 84, 112 and 84 -
5. Statistics Mean
The mean of 5 numbers is 36. If 4 of them are 39, 46, 42, 20, what is the missing number?
Answer: 33