Keystones — Cornerstone
Five GCSE retrieval questions · 18 April 2017 · mathsvault.uk/keystones
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1. Number Adding fractions
Calculate: 4⁄6 + 1⁄6
Answer: 5⁄6 -
2. Algebra Two-step equations
Solve: 5x + 9 = 39
Answer: x = 6 -
3. Geometry Pythagoras — hypotenuse
Calculate the hypotenuse when a = 12cm and b = 5cm
Answer: 13cm -
4. Ratio Sharing in a ratio
Share 50 in the ratio 2:3
Answer: 20 and 30 -
5. Statistics Mean
Calculate the mean of: 47, 5, 30, 15, 5, 36
Answer: 23