If $A \cap B = B$,then

Determine whether the following set is finite or infinite:
The set of positive integers greater than $100$.

Write the following as intervals: $\{x : x \in \mathbb{R}, 0 \le x < 7\}$

If $n(A) = 4$,$n(B) = 3$,and $n(A \times B \times C) = 24$,then find $n(C)$.

Examine whether the following statement is true or false:
$\{x : x \text{ is an even natural number less than } 6\} \subset \{x : x \text{ is a natural number which divides } 36\}$

Write the set $A = \{ 1, 4, 9, 16, 25, \dots \}$ in set-builder form.