Keystones — Cornerstone
Five GCSE retrieval questions · 3 January 2011 · mathsvault.uk/keystones
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1. Number Adding fractions
Calculate: 1⁄6 + 1⁄6
Answer: 1⁄3 -
2. Algebra Two-step equations
Solve: 6x + 3 = 63
Answer: x = 10 -
3. Geometry Pythagoras — hypotenuse
Calculate the hypotenuse when a = 6cm and b = 11cm. Give your answer to 2 decimal places
Answer: 12.53cm -
4. Ratio Sharing in a ratio
Share 108 in the ratio 2:1
Answer: 72 and 36 -
5. Statistics Mean
Calculate the mean of: 7, 47, 32, 27, 23, 39. Give your answer to 2 decimal places
Answer: 29.17