Let $A = \{1, 2\}, B = \{2, 3\}$. Evaluate $A \times B$.

In a certain office,$72 \%$ of the workers prefer cold drink and $44 \%$ prefer tea. If each of them prefers cold drink or tea and $40$ like both,then the total number of workers in the office is

The set $A = \{ x: x \in R, x^2 = 16 \text{ and } 2x = 6 \}$ equals

If the domain of the function $f(x) = x^2 - 6x + 7$ is $(-\infty, \infty)$,then the range of the function is:

The function $f:R \to R$ is defined by $f(x) = \cos^2 x + \sin^4 x$ for $x \in R$,then $f(R) \in $

The natural domain of the real-valued function defined by $f(x) = \sqrt{x^2 - 1} + \sqrt{x^2 + 1}$ is