Complete the given number series by finding the missing term.

$1, 9, 25, 49, 81, ?$

Complete the given number series by finding the missing term.

$4, 12, 36, 108, ?$

Complete the given number series by finding the missing term.

$240, ?, 120, 40, 10, 2$

Complete the given number series by finding the missing term.

$4, 6, 9, 13\frac{1}{3}, ?$

Complete the given number series by finding the missing term.

$6, 18, 3, 21, 7, 56, ?$

Complete the given number series by finding the missing terms.

$2, 15, 4, 12, 6, 7, ?, ?$

Complete the given number series by finding the missing term.

$\frac{2}{3}, \frac{4}{7}, ?, \frac{11}{21}, \frac{16}{31}$

Complete the given number series by finding missing term(s)

$\frac{2}{\sqrt{5}}, \frac{{\displaystyle 3}}{{\displaystyle 5}}, \frac{{\displaystyle 4}}{{\displaystyle 5\sqrt{5}}}, \frac{{\displaystyle 5}}{{\displaystyle 25}}, ?$

Complete the given number series by finding the missing term.

$2, 12, 36, 80, 150, ?$