Keystones — Cornerstone
Five GCSE retrieval questions · 8 March 2015 · mathsvault.uk/keystones
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1. Number Adding fractions
Calculate: 4⁄7 + 1⁄7
Answer: 5⁄7 -
2. Algebra Two-step equations
Solve: 3x + 12 = 30
Answer: x = 6 -
3. Geometry Pythagoras — hypotenuse
Find the hypotenuse of a right triangle with sides 12cm and 35cm
Answer: 37cm -
4. Ratio Sharing in a ratio
Share 112 in the ratio 4:3
Answer: 64 and 48 -
5. Statistics Mean
Calculate the mean of: 25, 45, 9, 13, 47, 30. Give your answer to 2 decimal places
Answer: 28.17