Keystones — Cornerstone
Five GCSE retrieval questions · 2 July 2019 · mathsvault.uk/keystones
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1. Number Adding fractions
Add: 3⁄8 + 1⁄6
Answer: 13⁄24 -
2. Algebra Two-step equations
Solve: 5x + 11 = 51
Answer: x = 8 -
3. Geometry Pythagoras — hypotenuse
Calculate the hypotenuse when a = 12cm and b = 9cm
Answer: 15cm -
4. Ratio Sharing in a ratio
Divide 125 in the ratio 2:1:2
Answer: 50, 25 and 50 -
5. Statistics Mean
Calculate the mean of: 14, 15, 24, 44, 17, 41, 15, 28
Answer: 24.8