Keystones — Cornerstone
Five GCSE retrieval questions · 7 November 2024 · mathsvault.uk/keystones
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1. Number Adding fractions
Calculate: 4⁄9 + 4⁄9
Answer: 8⁄9 -
2. Algebra Two-step equations
Solve: 5x + 6 = 51
Answer: x = 9 -
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 126 in the ratio 1:4:2
Answer: 18, 72 and 36 -
5. Statistics Mean
Calculate the mean of: 24, 35, 42, 12, 11, 8, 26, 44
Answer: 25.3