Keystones — Cornerstone
Five GCSE retrieval questions · 3 October 2019 · mathsvault.uk/keystones
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1. Number Adding fractions
Calculate: 3⁄5 + 1⁄5
Answer: 4⁄5 -
2. Algebra Two-step equations
Solve: 3x + 11 = 29
Answer: x = 6 -
3. Geometry Pythagoras — hypotenuse
Calculate the hypotenuse when a = 12cm and b = 12cm
Answer: 16.97cm -
4. Ratio Sharing in a ratio
Divide 91 in the ratio 2:1:4
Answer: 26, 13 and 52 -
5. Statistics Mean
Calculate the mean of: 36, 30, 40, 28, 37, 29
Answer: 33.3