Keystones — Cornerstone
Five GCSE retrieval questions · 9 August 2020 · mathsvault.uk/keystones
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1. Number Adding fractions
Add: 3⁄8 + 3⁄5
Answer: 39⁄40 -
2. Algebra Two-step equations
Solve: 2x + 3 = 23
Answer: x = 10 -
3. Geometry Pythagoras — hypotenuse
Calculate the hypotenuse when a = 12cm and b = 7cm
Answer: 13.89cm -
4. Ratio Sharing in a ratio
Divide 78 in the ratio 1:3:2
Answer: 13, 39 and 26 -
5. Statistics Mean
Find the mean of: 4, 3, 9, 17
Answer: 8.25