Keystones — Cornerstone
Five GCSE retrieval questions · 26 September 2020 · mathsvault.uk/keystones
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1. Number Adding fractions
Calculate: 3⁄10 + 5⁄10
Answer: 4⁄5 -
2. Algebra Two-step equations
Solve: 8x - 16 = 72
Answer: x = 11 -
3. Geometry Pythagoras — hypotenuse
Calculate the hypotenuse when a = 9cm and b = 13cm
Answer: 15.81cm -
4. Ratio Sharing in a ratio
Share 85 in the ratio 3:2
Answer: 51 and 34 -
5. Statistics Mean
Calculate the mean of: 19, 25, 18, 29, 25, 9, 8
Answer: 19