Write the following as intervals :

$\{ x:x \in R, - 12\, < \,x\, < \, - 10\} $

Write the following sets in roster form :

$D = \{ x:x$ is a prime number which is divisor of $60\} $

Which of the following sets are finite or infinite.

The set of months of a year

If $Q = \left\{ {x:x = {1 \over y},\,{\rm{where \,\,}}y \in N} \right\}$, then

Consider the sets

$\phi, A=\{1,3\}, B=\{1,5,9\}, C=\{1,3,5,7,9\}$

Insert the symbol $\subset$ or $ \not\subset $ between each of the following pair of sets:

$B \ldots \cdot C$

State which of the following sets are finite or infinite :

$\{ x:x \in N$ and $x$ is prime $\} $