Keystones — Cornerstone
Five GCSE retrieval questions · 3 December 2020 · mathsvault.uk/keystones
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1. Number Adding fractions
Calculate: 1⁄9 + 7⁄9
Answer: 8⁄9 -
2. Algebra Two-step equations
Solve: 4x - 16 = 0
Answer: x = 4 -
3. Geometry Pythagoras — hypotenuse
Calculate the hypotenuse when a = 5cm and b = 15cm
Answer: 15.81cm -
4. Ratio Sharing in a ratio
Share 60 in the ratio 4:1
Answer: 48 and 12 -
5. Statistics Mean
Calculate the mean of: 48, 22, 23, 48, 12, 6, 33
Answer: 27.4