Keystones — Cornerstone
Five GCSE retrieval questions · 29 July 2020 · mathsvault.uk/keystones
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1. Number Adding fractions
Add: 2⁄8 + 1⁄3
Answer: 7⁄12 -
2. Algebra Two-step equations
Solve: 5x + 5 = 55
Answer: x = 10 -
3. Geometry Pythagoras — hypotenuse
Calculate the hypotenuse when a = 7cm and b = 10cm
Answer: 12.21cm -
4. Ratio Sharing in a ratio
Divide 60 in the ratio 1:1:2
Answer: 15, 15 and 30 -
5. Statistics Mean
Calculate the mean of: 37, 33, 31, 18, 28, 33
Answer: 30