Keystones — Cornerstone
Five GCSE retrieval questions · 29 January 2022 · mathsvault.uk/keystones
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1. Number Adding fractions
Calculate: 1⁄9 + 3⁄9
Answer: 4⁄9 -
2. Algebra Two-step equations
Solve: 2x + 8 = 20
Answer: x = 6 -
3. Geometry Pythagoras — hypotenuse
Find the hypotenuse of a right triangle with sides 7cm and 24cm
Answer: 25cm -
4. Ratio Sharing in a ratio
Divide 200 in the ratio 4:3:1
Answer: 100, 75 and 25 -
5. Statistics Mean
Calculate the mean of: 47, 41, 9, 35, 9, 42, 42, 39
Answer: 33