book Maths Puzzle Numerical Ability

19= (the answers are........VIV,XXI,XIX,or none of these)

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book Other Question

5(x+5)=25+5x

a) -5 b) 0 c) all real numbers d) no solution if we graph the equation x = 0, this is the x axis, do we say that this linear equation has many "x -intercepts"?..in other words do we say a line can "cross itself" many times?