Keystones — Cornerstone
Five GCSE retrieval questions · 16 July 2016 · mathsvault.uk/keystones
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1. Number Adding fractions
Calculate: 1⁄5 + 3⁄5
Answer: 4⁄5 -
2. Algebra Two-step equations
Solve: 4x - 15 = 21
Answer: x = 9 -
3. Geometry Pythagoras — hypotenuse
Calculate the hypotenuse when a = 7cm and b = 15cm. Give your answer to 2 decimal places
Answer: 16.55cm -
4. Ratio Sharing in a ratio
Divide 119 in the ratio 1:3:3
Answer: 17, 51 and 51 -
5. Statistics Mean
Find the mean of: 5, 8, 2
Answer: 5