Keystones — Cornerstone
Five GCSE retrieval questions · 30 June 2014 · mathsvault.uk/keystones
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1. Number Adding fractions
Calculate: 2⁄7 + 1⁄7
Answer: 3⁄7 -
2. Algebra Two-step equations
Solve: 7x - 7 = 98
Answer: x = 15 -
3. Geometry Pythagoras — hypotenuse
Calculate the hypotenuse when a = 12cm and b = 9cm
Answer: 15cm -
4. Ratio Sharing in a ratio
Share 90 in the ratio 2:3
Answer: 36 and 54 -
5. Statistics Mean
Find the mean of: 4, 7, 15, 2
Answer: 7