Keystones — Cornerstone
Five GCSE retrieval questions · 21 August 2022 · mathsvault.uk/keystones
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1. Number Adding fractions
Calculate: 6⁄9 + 2⁄9
Answer: 8⁄9 -
2. Algebra Two-step equations
Solve: 2x + 11 = 27
Answer: x = 8 -
3. Geometry Pythagoras — hypotenuse
Find the hypotenuse of a right triangle with sides 8cm and 15cm
Answer: 17cm -
4. Ratio Sharing in a ratio
Divide 144 in the ratio 1:3:4
Answer: 18, 54 and 72 -
5. Statistics Mean
Calculate the mean of: 43, 25, 13, 7, 42, 16
Answer: 24.3