Keystones — Cornerstone
Five GCSE retrieval questions · 18 December 2015 · mathsvault.uk/keystones
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1. Number Adding fractions
Calculate: 1⁄9 + 6⁄9
Answer: 7⁄9 -
2. Algebra Two-step equations
Solve: 5x + 5 = 40
Answer: x = 7 -
3. Geometry Pythagoras — hypotenuse
Calculate the hypotenuse when a = 12cm and b = 7cm. Give your answer to 2 decimal places
Answer: 13.89cm -
4. Ratio Sharing in a ratio
Share 60 in the ratio 3:2
Answer: 36 and 24 -
5. Statistics Mean
Calculate the mean of: 28, 28, 44, 18, 36, 11, 47. Give your answer to 2 decimal places
Answer: 30.29