Keystones — Cornerstone
Five GCSE retrieval questions · 6 August 2011 · mathsvault.uk/keystones
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1. Number Adding fractions
Calculate: 3⁄11 + 7⁄11
Answer: 10⁄11 -
2. Algebra Two-step equations
Solve: 6x - 17 = 25
Answer: x = 7 -
3. Geometry Pythagoras — hypotenuse
Calculate the hypotenuse when a = 11cm and b = 9cm. Give your answer to 2 decimal places
Answer: 14.21cm -
4. Ratio Sharing in a ratio
Share 100 in the ratio 2:3
Answer: 40 and 60 -
5. Statistics Mean
Find the mean of: 2, 25, 6
Answer: 11