Keystones — Cornerstone
Five GCSE retrieval questions · 24 August 2010 · mathsvault.uk/keystones
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1. Number Adding fractions
Calculate: 5⁄11 + 2⁄11
Answer: 7⁄11 -
2. Algebra Two-step equations
Solve: 3x + 7 = 40
Answer: x = 11 -
3. Geometry Pythagoras — hypotenuse
Calculate the hypotenuse when a = 5cm and b = 8cm. Give your answer to 2 decimal places
Answer: 9.43cm -
4. Ratio Sharing in a ratio
Share 40 in the ratio 3:1
Answer: 30 and 10 -
5. Statistics Mean
Find the mean of: 12, 6, 16, 6
Answer: 10