Keystones — Cornerstone
Five GCSE retrieval questions · 28 December 2015 · mathsvault.uk/keystones
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1. Number Adding fractions
Calculate: 7⁄10 + 1⁄10
Answer: 4⁄5 -
2. Algebra Two-step equations
Solve: 6x - 17 = 19
Answer: x = 6 -
3. Geometry Pythagoras — hypotenuse
Calculate the hypotenuse when a = 3cm and b = 9cm. Give your answer to 2 decimal places
Answer: 9.49cm -
4. Ratio Sharing in a ratio
Divide 261 in the ratio 3:2:4
Answer: 87, 58 and 116 -
5. Statistics Mean
Find the mean of: 12, 12, 13, 11, 2
Answer: 10