Keystones — Cornerstone
Five GCSE retrieval questions · 6 March 2013 · mathsvault.uk/keystones
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1. Number Adding fractions
Calculate: 4⁄7 + 2⁄7
Answer: 6⁄7 -
2. Algebra Two-step equations
Solve: 5x + 5 = 20
Answer: x = 3 -
3. Geometry Pythagoras — hypotenuse
Calculate the hypotenuse when a = 3cm and b = 9cm. Give your answer to 2 decimal places
Answer: 9.49cm -
4. Ratio Sharing in a ratio
Share 30 in the ratio 2:1
Answer: 20 and 10 -
5. Statistics Mean
Find the mean of: 14, 3, 22
Answer: 13