Keystones — Cornerstone
Five GCSE retrieval questions · 10 September 2019 · mathsvault.uk/keystones
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1. Number Adding fractions
Add: 2⁄5 + 3⁄8
Answer: 31⁄40 -
2. Algebra Two-step equations
Solve: 4x - 20 = 4
Answer: x = 6 -
3. Geometry Pythagoras — hypotenuse
Calculate the hypotenuse when a = 5cm and b = 11cm
Answer: 12.08cm -
4. Ratio Sharing in a ratio
Divide 189 in the ratio 3:2:2
Answer: 81, 54 and 54 -
5. Statistics Mean
Find the mean of: 11, 20, 20, 14
Answer: 16.25