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# Is {$x : x$ is a natural numbers, $x \lt 5$ and $x \gt 1\}$ a null set?

$\begin{array}{1 1}(A)\;\text{Null set}\\(B)\;\text{Not a null set}\end{array}$

There is no natural numbers such that x < 5 and as well as x > 1
$\therefore$ It is a null set.
Hence (A) is the correct answer.

edited Aug 12, 2014