Keystones — Cornerstone
Five GCSE retrieval questions · 12 August 2020 · mathsvault.uk/keystones
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1. Number Adding fractions
Add: 1⁄3 + 3⁄7
Answer: 16⁄21 -
2. Algebra Two-step equations
Solve: 5x - 8 = 62
Answer: x = 14 -
3. Geometry Pythagoras — hypotenuse
Find the hypotenuse of a right triangle with sides 9cm and 12cm
Answer: 15cm -
4. Ratio Sharing in a ratio
Divide 162 in the ratio 2:4:3
Answer: 36, 72 and 54 -
5. Statistics Mean
Calculate the mean of: 42, 33, 16, 50, 7, 19, 33, 29
Answer: 28.6