Keystones — Cornerstone
Five GCSE retrieval questions · 5 August 2020 · mathsvault.uk/keystones
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1. Number Adding fractions
Calculate: 1⁄10 + 1⁄10
Answer: 1⁄5 -
2. Algebra Two-step equations
Solve: 2x + 7 = 31
Answer: x = 12 -
3. Geometry Pythagoras — hypotenuse
Find the hypotenuse of a right triangle with sides 12cm and 35cm
Answer: 37cm -
4. Ratio Sharing in a ratio
Divide 182 in the ratio 4:1:2
Answer: 104, 26 and 52 -
5. Statistics Mean
Find the mean of: 20, 15, 3, 19, 9
Answer: 13.2