Keystones — Cornerstone
Five GCSE retrieval questions · 14 March 2012 · mathsvault.uk/keystones
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1. Number Adding fractions
Calculate: 6⁄10 + 1⁄10
Answer: 7⁄10 -
2. Algebra Two-step equations
Solve: 3x + 12 = 30
Answer: x = 6 -
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 161 in the ratio 1:4:2
Answer: 23, 92 and 46 -
5. Statistics Mean
Calculate the mean of: 17, 35, 22, 37, 28, 42, 37, 8
Answer: 28.25