Keystones — Cornerstone
Five GCSE retrieval questions · 27 August 2013 · mathsvault.uk/keystones
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1. Number Adding fractions
Calculate: 2⁄6 + 1⁄6
Answer: 1⁄2 -
2. Algebra Two-step equations
Solve: 4x + 13 = 49
Answer: x = 9 -
3. Geometry Pythagoras — hypotenuse
Calculate the hypotenuse when a = 11cm and b = 7cm. Give your answer to 2 decimal places
Answer: 13.04cm -
4. Ratio Sharing in a ratio
Divide 77 in the ratio 2:3:2
Answer: 22, 33 and 22 -
5. Statistics Mean
Calculate the mean of: 23, 10, 50, 16, 37, 42, 17, 22. Give your answer to 2 decimal places
Answer: 27.13