Keystones — Cornerstone
Five GCSE retrieval questions · 3 November 2013 · mathsvault.uk/keystones
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1. Number Adding fractions
Add: 5⁄7 + 2⁄6
Answer: 22⁄21 -
2. Algebra Two-step equations
Solve: 3x + 14 = 29
Answer: x = 5 -
3. Geometry Pythagoras — hypotenuse
Calculate the hypotenuse when a = 9cm and b = 15cm. Give your answer to 2 decimal places
Answer: 17.49cm -
4. Ratio Sharing in a ratio
Divide 140 in the ratio 3:3:1
Answer: 60, 60 and 20 -
5. Statistics Mean
Find the mean of: 5, 6, 13, 12, 14
Answer: 10