Keystones — Cornerstone
Five GCSE retrieval questions · 14 June 2021 · 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: 2x - 12 = 6
Answer: x = 9 -
3. Geometry Pythagoras — hypotenuse
Calculate the hypotenuse when a = 11cm and b = 10cm
Answer: 14.87cm -
4. Ratio Sharing in a ratio
Divide 208 in the ratio 4:3:1
Answer: 104, 78 and 26 -
5. Statistics Mean
Calculate the mean of: 34, 37, 40, 33, 9, 40
Answer: 32.2