Keystones — Cornerstone
Five GCSE retrieval questions · 8 April 2016 · 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: 6x - 6 = 18
Answer: x = 4 -
3. Geometry Pythagoras — hypotenuse
Calculate the hypotenuse when a = 6cm and b = 4cm. Give your answer to 2 decimal places
Answer: 7.21cm -
4. Ratio Sharing in a ratio
Divide 154 in the ratio 2:2:3
Answer: 44, 44 and 66 -
5. Statistics Mean
Calculate the mean of: 30, 45, 49, 24, 10, 30. Give your answer to 2 decimal places
Answer: 31.33