Keystones — Cornerstone
Five GCSE retrieval questions · 10 April 2017 · mathsvault.uk/keystones
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1. Number Adding fractions
Calculate: 7⁄9 + 1⁄9
Answer: 8⁄9 -
2. Algebra Two-step equations
Solve: 7x + 13 = 55
Answer: x = 6 -
3. Geometry Pythagoras — hypotenuse
Calculate the hypotenuse when a = 10cm and b = 9cm. Give your answer to 2 decimal places
Answer: 13.45cm -
4. Ratio Sharing in a ratio
Divide 84 in the ratio 3:2:2
Answer: 36, 24 and 24 -
5. Statistics Mean
Find the mean of: 16, 7, 16
Answer: 13