Keystones — Lintel
Five GCSE retrieval questions · 22 March 2018 · mathsvault.uk/keystones
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1. Number Converting to standard form
84000000
Answer: 8.4 × 107 -
2. Algebra Factorising monic quadratics
Factorise: x² - 5x + 6
Answer: (x - 2)(x - 3) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 40cm, angle = 30°. Find adjacent side
Answer: 34.6cm -
4. Ratio Mixed ratio problems
Divide 126 in the ratio 4:3:2
Answer: 56, 42 and 28 -
5. Statistics Mean
The mean of 6 numbers is 29. If 5 of them are 50, 38, 36, 43, 39, what is the missing number?
Answer: -32