Keystones — Cornerstone
Five GCSE retrieval questions · 7 April 2016 · mathsvault.uk/keystones
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1. Number Adding fractions
Calculate: 3⁄6 + 2⁄6
Answer: 5⁄6 -
2. Algebra Two-step equations
Solve: 6x - 9 = 33
Answer: x = 7 -
3. Geometry Pythagoras — hypotenuse
Calculate the hypotenuse when a = 9cm and b = 13cm. Give your answer to 2 decimal places
Answer: 15.81cm -
4. Ratio Sharing in a ratio
Divide 108 in the ratio 4:2:3
Answer: 48, 24 and 36 -
5. Statistics Mean
Calculate the mean of: 36, 26, 34, 10, 28, 6, 45. Give your answer to 2 decimal places
Answer: 26.43