Keystones — Cornerstone
Five GCSE retrieval questions · 26 October 2014 · mathsvault.uk/keystones
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1. Number Adding fractions
Calculate: 1⁄10 + 2⁄10
Answer: 3⁄10 -
2. Algebra Two-step equations
Solve: 3x - 16 = 23
Answer: x = 13 -
3. Geometry Pythagoras — hypotenuse
Calculate the hypotenuse when a = 4cm and b = 8cm. Give your answer to 2 decimal places
Answer: 8.94cm -
4. Ratio Sharing in a ratio
Divide 182 in the ratio 3:1:3
Answer: 78, 26 and 78 -
5. Statistics Mean
Calculate the mean of: 20, 9, 12, 15, 24, 50, 18. Give your answer to 2 decimal places
Answer: 21.14