book Maths Puzzle Numerical Ability

At lunch, 5 people out of a group of 9 had hamburgers. What fraction names the part of the group who had hamburgers? What fraction names the part who did not have hamburgers?

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book Other Question
Write the following phrase using symbols. Use the variable x to represent the number.

A number divided by 10 what is the equation form passing through lines (1,3)and (-1,2)