Keystones — Cornerstone
Five GCSE retrieval questions · 26 June 2016 · mathsvault.uk/keystones
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1. Number Adding fractions
Calculate: 2⁄11 + 1⁄11
Answer: 3⁄11 -
2. Algebra Two-step equations
Solve: 6x - 12 = 78
Answer: x = 15 -
3. Geometry Pythagoras — hypotenuse
Calculate the hypotenuse when a = 6cm and b = 8cm
Answer: 10cm -
4. Ratio Sharing in a ratio
Divide 115 in the ratio 3:1:1
Answer: 69, 23 and 23 -
5. Statistics Mean
Calculate the mean of: 41, 24, 27, 16, 36, 19, 38. Give your answer to 2 decimal places
Answer: 28.71