Keystones — Cornerstone
Five GCSE retrieval questions · 18 May 2017 · mathsvault.uk/keystones
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1. Number Adding fractions
Calculate: 1⁄9 + 4⁄9
Answer: 5⁄9 -
2. Algebra Two-step equations
Solve: 2x - 6 = 14
Answer: x = 10 -
3. Geometry Pythagoras — hypotenuse
Calculate the hypotenuse when a = 10cm and b = 11cm. Give your answer to 2 decimal places
Answer: 14.87cm -
4. Ratio Sharing in a ratio
Divide 189 in the ratio 4:2:1
Answer: 108, 54 and 27 -
5. Statistics Mean
Calculate the mean of: 27, 7, 25, 7, 25, 19, 40. Give your answer to 2 decimal places
Answer: 21.43