Keystones — Cornerstone
Five GCSE retrieval questions · 5 August 2010 · mathsvault.uk/keystones
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1. Number Adding fractions
Calculate: 6⁄9 + 2⁄9
Answer: 8⁄9 -
2. Algebra Two-step equations
Solve: 8x - 9 = 39
Answer: x = 6 -
3. Geometry Pythagoras — hypotenuse
Find the hypotenuse of a right triangle with sides 12cm and 35cm
Answer: 37cm -
4. Ratio Sharing in a ratio
Share 72 in the ratio 1:3
Answer: 18 and 54 -
5. Statistics Mean
Find the mean of: 15, 9, 18
Answer: 14