Keystones — Lintel
Five GCSE retrieval questions · 18 September 2016 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 43,000 in standard form
Answer: 4.3 × 104 -
2. Algebra Factorising monic quadratics
Factorise: x² - 11x + 24
Answer: (x - 3)(x - 8) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 26cm, angle = 46°. Find adjacent side. Give your answer to 2 decimal places
Answer: 18.06cm -
4. Ratio Mixed ratio problems
Divide 261 in the ratio 3:4:2
Answer: 87, 116 and 58 -
5. Statistics Mean
The mean of 5 numbers is 35. If 4 of them are 41, 31, 35, 20, what is the missing number?
Answer: 48