Keystones — Cornerstone
Five GCSE retrieval questions · 4 February 2013 · mathsvault.uk/keystones
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1. Number Adding fractions
Calculate: 9⁄12 + 2⁄12
Answer: 11⁄12 -
2. Algebra Two-step equations
Solve: 2x + 7 = 15
Answer: x = 4 -
3. Geometry Pythagoras — hypotenuse
Calculate the hypotenuse when a = 3cm and b = 9cm. Give your answer to 2 decimal places
Answer: 9.49cm -
4. Ratio Sharing in a ratio
Divide 175 in the ratio 3:3:1
Answer: 75, 75 and 25 -
5. Statistics Mean
Calculate the mean of: 5, 37, 46, 35, 48, 30
Answer: 33.5