Keystones — Cornerstone
Five GCSE retrieval questions · 26 November 2014 · mathsvault.uk/keystones
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1. Number Adding fractions
Calculate: 7⁄11 + 2⁄11
Answer: 9⁄11 -
2. Algebra Two-step equations
Solve: 3x + 10 = 43
Answer: x = 11 -
3. Geometry Pythagoras — hypotenuse
Calculate the hypotenuse when a = 10cm and b = 12cm. Give your answer to 2 decimal places
Answer: 15.62cm -
4. Ratio Sharing in a ratio
Share 70 in the ratio 3:4
Answer: 30 and 40 -
5. Statistics Mean
Calculate the mean of: 10, 5, 47, 34, 13, 41
Answer: 25