Keystones — Cornerstone
Five GCSE retrieval questions · 7 July 2019 · mathsvault.uk/keystones
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1. Number Adding fractions
Add: 1⁄3 + 3⁄4
Answer: 13⁄12 -
2. Algebra Two-step equations
Solve: 7x - 9 = 75
Answer: x = 12 -
3. Geometry Pythagoras — hypotenuse
Calculate the hypotenuse when a = 3cm and b = 4cm
Answer: 5cm -
4. Ratio Sharing in a ratio
Share 36 in the ratio 1:2
Answer: 12 and 24 -
5. Statistics Mean
Calculate the mean of: 41, 32, 44, 10, 28, 41, 15, 9
Answer: 27.5