Keystones — Cornerstone
Five GCSE retrieval questions · 13 December 2018 · mathsvault.uk/keystones
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1. Number Adding fractions
Calculate: 8⁄10 + 1⁄10
Answer: 9⁄10 -
2. Algebra Two-step equations
Solve: 7x + 8 = 78
Answer: x = 10 -
3. Geometry Pythagoras — hypotenuse
Find the hypotenuse of a right triangle with sides 9cm and 12cm
Answer: 15cm -
4. Ratio Sharing in a ratio
Share 119 in the ratio 3:4
Answer: 51 and 68 -
5. Statistics Mean
Calculate the mean of: 26, 25, 48, 22, 14, 45, 24
Answer: 29.1