Keystones — Cornerstone
Five GCSE retrieval questions · 26 November 2011 · mathsvault.uk/keystones
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1. Number Adding fractions
Calculate: 4⁄9 + 4⁄9
Answer: 8⁄9 -
2. Algebra Two-step equations
Solve: 4x - 5 = 19
Answer: x = 6 -
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 90 in the ratio 1:1:4
Answer: 15, 15 and 60 -
5. Statistics Mean
Find the mean of: 15, 17, 19, 10, 4
Answer: 13