Keystones — Cornerstone
Five GCSE retrieval questions · 17 May 2017 · mathsvault.uk/keystones
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1. Number Adding fractions
Calculate: 3⁄7 + 2⁄7
Answer: 5⁄7 -
2. Algebra Two-step equations
Solve: 2x - 20 = 8
Answer: x = 14 -
3. Geometry Pythagoras — hypotenuse
Calculate the hypotenuse when a = 9cm and b = 9cm. Give your answer to 2 decimal places
Answer: 12.73cm -
4. Ratio Sharing in a ratio
Divide 75 in the ratio 3:1:1
Answer: 45, 15 and 15 -
5. Statistics Mean
Calculate the mean of: 43, 30, 15, 28, 32, 6. Give your answer to 2 decimal places
Answer: 25.67