Keystones — Cornerstone
Five GCSE retrieval questions · 22 September 2014 · mathsvault.uk/keystones
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1. Number Adding fractions
Calculate: 4⁄6 + 1⁄6
Answer: 5⁄6 -
2. Algebra Two-step equations
Solve: 5x - 14 = 51
Answer: x = 13 -
3. Geometry Pythagoras — hypotenuse
Calculate the hypotenuse when a = 11cm and b = 11cm. Give your answer to 2 decimal places
Answer: 15.56cm -
4. Ratio Sharing in a ratio
Divide 99 in the ratio 4:2:3
Answer: 44, 22 and 33 -
5. Statistics Mean
Calculate the mean of: 17, 31, 36, 27, 47, 33. Give your answer to 2 decimal places
Answer: 31.83