Keystones — Cornerstone
Five GCSE retrieval questions · 20 March 2014 · mathsvault.uk/keystones
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1. Number Adding fractions
Calculate: 2⁄5 + 2⁄5
Answer: 4⁄5 -
2. Algebra Two-step equations
Solve: 5x + 7 = 42
Answer: x = 7 -
3. Geometry Pythagoras — hypotenuse
Calculate the hypotenuse when a = 12cm and b = 10cm. Give your answer to 2 decimal places
Answer: 15.62cm -
4. Ratio Sharing in a ratio
Divide 70 in the ratio 1:1:3
Answer: 14, 14 and 42 -
5. Statistics Mean
Calculate the mean of: 33, 32, 35, 12, 10, 31
Answer: 25.5