Keystones — Cornerstone
Five GCSE retrieval questions · 13 January 2020 · mathsvault.uk/keystones
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1. Number Adding fractions
Calculate: 2⁄7 + 3⁄7
Answer: 5⁄7 -
2. Algebra Two-step equations
Solve: 6x + 8 = 68
Answer: x = 10 -
3. Geometry Pythagoras — hypotenuse
Calculate the hypotenuse when a = 9cm and b = 6cm
Answer: 10.82cm -
4. Ratio Sharing in a ratio
Share 51 in the ratio 1:2
Answer: 17 and 34 -
5. Statistics Mean
Calculate the mean of: 32, 13, 47, 16, 29, 29, 20
Answer: 26.6