Keystones — Cornerstone
Five GCSE retrieval questions · 15 April 2010 · 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: 5x + 7 = 27
Answer: x = 4 -
3. Geometry Pythagoras — hypotenuse
Calculate the hypotenuse when a = 4cm and b = 6cm. Give your answer to 2 decimal places
Answer: 7.21cm -
4. Ratio Sharing in a ratio
Share 28 in the ratio 1:3
Answer: 7 and 21 -
5. Statistics Mean
Find the mean of: 14, 19, 14, 20, 8
Answer: 15