Keystones — Cornerstone
Five GCSE retrieval questions · 6 October 2019 · mathsvault.uk/keystones
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1. Number Adding fractions
Calculate: 4⁄7 + 2⁄7
Answer: 6⁄7 -
2. Algebra Two-step equations
Solve: 7x - 12 = 93
Answer: x = 15 -
3. Geometry Pythagoras — hypotenuse
Calculate the hypotenuse when a = 5cm and b = 13cm
Answer: 13.93cm -
4. Ratio Sharing in a ratio
Share 27 in the ratio 2:1
Answer: 18 and 9 -
5. Statistics Mean
Calculate the mean of: 14, 47, 32, 41, 6, 28, 50, 25
Answer: 30.4