Keystones — Cornerstone
Five GCSE retrieval questions · 6 September 2011 · mathsvault.uk/keystones
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1. Number Adding fractions
Calculate: 3⁄11 + 6⁄11
Answer: 9⁄11 -
2. Algebra Two-step equations
Solve: 7x + 7 = 49
Answer: x = 6 -
3. Geometry Pythagoras — hypotenuse
Calculate the hypotenuse when a = 4cm and b = 10cm. Give your answer to 2 decimal places
Answer: 10.77cm -
4. Ratio Sharing in a ratio
Divide 128 in the ratio 3:2:3
Answer: 48, 32 and 48 -
5. Statistics Mean
Find the mean of: 13, 18, 8
Answer: 13