Keystones — Cornerstone
Five GCSE retrieval questions · 30 November 2017 · mathsvault.uk/keystones
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1. Number Adding fractions
Add: 4⁄7 + 4⁄8
Answer: 15⁄14 -
2. Algebra Two-step equations
Solve: 5x + 9 = 49
Answer: x = 8 -
3. Geometry Pythagoras — hypotenuse
Calculate the hypotenuse when a = 12cm and b = 5cm
Answer: 13cm -
4. Ratio Sharing in a ratio
Divide 200 in the ratio 1:2:2
Answer: 40, 80 and 80 -
5. Statistics Mean
Find the mean of: 16, 10, 10
Answer: 12