Keystones — Cornerstone
Five GCSE retrieval questions · 16 November 2014 · mathsvault.uk/keystones
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1. Number Adding fractions
Calculate: 3⁄5 + 1⁄5
Answer: 4⁄5 -
2. Algebra Two-step equations
Solve: 3x - 6 = 12
Answer: x = 6 -
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 60 in the ratio 3:1:1
Answer: 36, 12 and 12 -
5. Statistics Mean
Find the mean of: 8, 18, 14, 8
Answer: 12