Keystones — Cornerstone
Five GCSE retrieval questions · 10 December 2020 · mathsvault.uk/keystones
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1. Number Adding fractions
Calculate: 5⁄9 + 3⁄9
Answer: 8⁄9 -
2. Algebra Two-step equations
Solve: 5x + 13 = 68
Answer: x = 11 -
3. Geometry Pythagoras — hypotenuse
Find the hypotenuse of a right triangle with sides 9cm and 12cm
Answer: 15cm -
4. Ratio Sharing in a ratio
Divide 243 in the ratio 4:4:1
Answer: 108, 108 and 27 -
5. Statistics Mean
Calculate the mean of: 41, 27, 26, 32, 5, 11, 7, 32
Answer: 22.6