Keystones — Cornerstone
Five GCSE retrieval questions · 23 May 2014 · mathsvault.uk/keystones
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1. Number Adding fractions
Calculate: 6⁄11 + 1⁄11
Answer: 7⁄11 -
2. Algebra Two-step equations
Solve: 5x + 10 = 70
Answer: x = 12 -
3. Geometry Pythagoras — hypotenuse
Calculate the hypotenuse when a = 9cm and b = 15cm. Give your answer to 2 decimal places
Answer: 17.49cm -
4. Ratio Sharing in a ratio
Share 35 in the ratio 3:4
Answer: 15 and 20 -
5. Statistics Mean
Find the mean of: 21, 15, 7, 9
Answer: 13