Keystones — Cornerstone
Five GCSE retrieval questions · 24 November 2011 · mathsvault.uk/keystones
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1. Number Adding fractions
Calculate: 2⁄7 + 4⁄7
Answer: 6⁄7 -
2. Algebra Two-step equations
Solve: 3x + 13 = 49
Answer: x = 12 -
3. Geometry Pythagoras — hypotenuse
Calculate the hypotenuse when a = 5cm and b = 12cm
Answer: 13cm -
4. Ratio Sharing in a ratio
Divide 162 in the ratio 4:3:2
Answer: 72, 54 and 36 -
5. Statistics Mean
Calculate the mean of: 43, 49, 15, 14, 21, 16. Give your answer to 2 decimal places
Answer: 26.33