Keystones — Cornerstone
Five GCSE retrieval questions · 8 September 2012 · mathsvault.uk/keystones
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1. Number Adding fractions
Calculate: 4⁄12 + 4⁄12
Answer: 2⁄3 -
2. Algebra Two-step equations
Solve: 7x - 12 = 37
Answer: x = 7 -
3. Geometry Pythagoras — hypotenuse
Calculate the hypotenuse when a = 8cm and b = 6cm
Answer: 10cm -
4. Ratio Sharing in a ratio
Share 84 in the ratio 1:2
Answer: 28 and 56 -
5. Statistics Mean
Find the mean of: 17, 17, 17, 4, 15
Answer: 14