Keystones — Lintel
Five GCSE retrieval questions · 30 September 2016 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.026 in standard form
Answer: 2.6 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² - 23x + 132
Answer: (x - 11)(x - 12) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 25cm, angle = 55°. Find adjacent side. Give your answer to 2 decimal places
Answer: 14.34cm -
4. Ratio Mixed ratio problems
In ratio 5:2:4, what fraction is the third part?
Answer: 4⁄11 -
5. Statistics Mean
The mean of 4 numbers is 39. If 3 of them are 36, 18, 32, what is the missing number?
Answer: 70