Keystones — Cornerstone
Five GCSE retrieval questions · 29 March 2015 · mathsvault.uk/keystones
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1. Number Adding fractions
Calculate: 5⁄8 + 1⁄8
Answer: 3⁄4 -
2. Algebra Two-step equations
Solve: 7x - 18 = 52
Answer: x = 10 -
3. Geometry Pythagoras — hypotenuse
Calculate the hypotenuse when a = 11cm and b = 7cm. Give your answer to 2 decimal places
Answer: 13.04cm -
4. Ratio Sharing in a ratio
Share 70 in the ratio 3:2
Answer: 42 and 28 -
5. Statistics Mean
Calculate the mean of: 28, 43, 46, 14, 24, 47, 11. Give your answer to 2 decimal places
Answer: 30.43