Keystones — Cornerstone
Five GCSE retrieval questions · 9 February 2011 · mathsvault.uk/keystones
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1. Number Adding fractions
Calculate: 2⁄5 + 2⁄5
Answer: 4⁄5 -
2. Algebra Two-step equations
Solve: 6x - 5 = 79
Answer: x = 14 -
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 44 in the ratio 3:1
Answer: 33 and 11 -
5. Statistics Mean
Calculate the mean of: 33, 40, 23, 22, 19, 33, 30. Give your answer to 2 decimal places
Answer: 28.57