Keystones — Cornerstone
Five GCSE retrieval questions · 13 February 2013 · mathsvault.uk/keystones
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1. Number Adding fractions
Add: 4⁄7 + 1⁄3
Answer: 19⁄21 -
2. Algebra Two-step equations
Solve: 6x - 12 = 72
Answer: x = 14 -
3. Geometry Pythagoras — hypotenuse
Calculate the hypotenuse when a = 5cm and b = 10cm. Give your answer to 2 decimal places
Answer: 11.18cm -
4. Ratio Sharing in a ratio
Divide 126 in the ratio 3:1:2
Answer: 63, 21 and 42 -
5. Statistics Mean
Find the mean of: 2, 16, 20, 13, 9
Answer: 12