Keystones — Cornerstone
Five GCSE retrieval questions · 30 March 2011 · mathsvault.uk/keystones
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1. Number Adding fractions
Add: 6⁄8 + 2⁄3
Answer: 17⁄12 -
2. Algebra Two-step equations
Solve: 2x + 11 = 25
Answer: x = 7 -
3. Geometry Pythagoras — hypotenuse
Calculate the hypotenuse when a = 7cm and b = 10cm. Give your answer to 2 decimal places
Answer: 12.21cm -
4. Ratio Sharing in a ratio
Divide 90 in the ratio 1:1:3
Answer: 18, 18 and 54 -
5. Statistics Mean
Find the mean of: 7, 20, 9
Answer: 12