Keystones — Cornerstone
Five GCSE retrieval questions · 10 October 2010 · mathsvault.uk/keystones
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1. Number Adding fractions
Calculate: 1⁄6 + 4⁄6
Answer: 5⁄6 -
2. Algebra Two-step equations
Solve: 3x + 12 = 30
Answer: x = 6 -
3. Geometry Pythagoras — hypotenuse
Calculate the hypotenuse when a = 10cm and b = 6cm. Give your answer to 2 decimal places
Answer: 11.66cm -
4. Ratio Sharing in a ratio
Share 76 in the ratio 1:3
Answer: 19 and 57 -
5. Statistics Mean
Calculate the mean of: 43, 48, 6, 27, 19, 20, 14, 33
Answer: 26.25