Keystones — Cornerstone
Five GCSE retrieval questions · 5 December 2011 · mathsvault.uk/keystones
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1. Number Adding fractions
Calculate: 1⁄7 + 1⁄7
Answer: 2⁄7 -
2. Algebra Two-step equations
Solve: 4x - 18 = 22
Answer: x = 10 -
3. Geometry Pythagoras — hypotenuse
Calculate the hypotenuse when a = 4cm and b = 14cm. Give your answer to 2 decimal places
Answer: 14.56cm -
4. Ratio Sharing in a ratio
Share 33 in the ratio 1:2
Answer: 11 and 22 -
5. Statistics Mean
Calculate the mean of: 41, 15, 34, 16, 21, 44, 42. Give your answer to 2 decimal places
Answer: 30.43