The number of elements in the set $\{x \in R :(|x|-3)|x+4|=6\}$ is equal to
Write down all the subsets of the following sets
$\{ a,b\} $
Write the following as intervals :
$\{ x:x \in R,3\, \le \,x\, \le \,4\} $
Which of the following are examples of the null set
Set of odd natural numbers divisible by $2$
Which of the following are sets ? Justify your answer.
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