Keystones — Cornerstone
Five GCSE retrieval questions · 12 April 2017 · mathsvault.uk/keystones
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1. Number Adding fractions
Calculate: 1⁄7 + 2⁄7
Answer: 3⁄7 -
2. Algebra Two-step equations
Solve: 2x - 12 = 10
Answer: x = 11 -
3. Geometry Pythagoras — hypotenuse
Calculate the hypotenuse when a = 3cm and b = 7cm. Give your answer to 2 decimal places
Answer: 7.62cm -
4. Ratio Sharing in a ratio
Divide 112 in the ratio 3:2:2
Answer: 48, 32 and 32 -
5. Statistics Mean
Calculate the mean of: 19, 24, 9, 42, 29, 8, 38. Give your answer to 2 decimal places
Answer: 24.14