Keystones — Cornerstone
Five GCSE retrieval questions · 14 October 2011 · mathsvault.uk/keystones
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1. Number Adding fractions
Calculate: 7⁄10 + 2⁄10
Answer: 9⁄10 -
2. Algebra Two-step equations
Solve: 5x + 10 = 25
Answer: x = 3 -
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 52 in the ratio 2:1:1
Answer: 26, 13 and 13 -
5. Statistics Mean
Find the mean of: 10, 6, 5
Answer: 7