Keystones — Cornerstone
Five GCSE retrieval questions · 27 October 2012 · mathsvault.uk/keystones
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1. Number Adding fractions
Calculate: 5⁄11 + 4⁄11
Answer: 9⁄11 -
2. Algebra Two-step equations
Solve: 8x - 16 = 80
Answer: x = 12 -
3. Geometry Pythagoras — hypotenuse
Find the hypotenuse of a right triangle with sides 15cm and 20cm
Answer: 25cm -
4. Ratio Sharing in a ratio
Divide 126 in the ratio 3:4:2
Answer: 42, 56 and 28 -
5. Statistics Mean
Find the mean of: 14, 18, 9, 7
Answer: 12