Keystones — Cornerstone
Five GCSE retrieval questions · 2 September 2012 · mathsvault.uk/keystones
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1. Number Adding fractions
Calculate: 3⁄9 + 2⁄9
Answer: 5⁄9 -
2. Algebra Two-step equations
Solve: 3x + 8 = 26
Answer: x = 6 -
3. Geometry Pythagoras — hypotenuse
Calculate the hypotenuse when a = 10cm and b = 7cm. Give your answer to 2 decimal places
Answer: 12.21cm -
4. Ratio Sharing in a ratio
Divide 152 in the ratio 3:3:2
Answer: 57, 57 and 38 -
5. Statistics Mean
Find the mean of: 4, 4, 17, 19, 1
Answer: 9