Keystones — Cornerstone
Five GCSE retrieval questions · 19 September 2010 · mathsvault.uk/keystones
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1. Number Adding fractions
Calculate: 3⁄11 + 4⁄11
Answer: 7⁄11 -
2. Algebra Two-step equations
Solve: 7x - 9 = 26
Answer: x = 5 -
3. Geometry Pythagoras — hypotenuse
Calculate the hypotenuse when a = 12cm and b = 9cm
Answer: 15cm -
4. Ratio Sharing in a ratio
Share 32 in the ratio 3:1
Answer: 24 and 8 -
5. Statistics Mean
Find the mean of: 2, 3, 18, 20, 7
Answer: 10