Keystones — Cornerstone
Five GCSE retrieval questions · 21 September 2019 · mathsvault.uk/keystones
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1. Number Adding fractions
Calculate: 5⁄9 + 1⁄9
Answer: 2⁄3 -
2. Algebra Two-step equations
Solve: 5x - 8 = 67
Answer: x = 15 -
3. Geometry Pythagoras — hypotenuse
Find the hypotenuse of a right triangle with sides 9cm and 40cm
Answer: 41cm -
4. Ratio Sharing in a ratio
Share 42 in the ratio 1:2
Answer: 14 and 28 -
5. Statistics Mean
Find the mean of: 11, 15, 17
Answer: 14.333333333333