Keystones — Cornerstone
Five GCSE retrieval questions · 28 June 2011 · mathsvault.uk/keystones
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1. Number Adding fractions
Add: 5⁄7 + 2⁄3
Answer: 29⁄21 -
2. Algebra Two-step equations
Solve: 5x - 13 = 22
Answer: x = 7 -
3. Geometry Pythagoras — hypotenuse
Find the hypotenuse of a right triangle with sides 20cm and 21cm
Answer: 29cm -
4. Ratio Sharing in a ratio
Divide 120 in the ratio 3:4:3
Answer: 36, 48 and 36 -
5. Statistics Mean
Find the mean of: 17, 6, 7
Answer: 10