Find the odd number from the given sequence: $24, 18, 222, 82, 421$.

Find the odd number in the given sequence: $5531, 5506, 5425, 5344, 5135, 4910, 4621$.

Find out the odd number from the given sequence: $8, 13, 21, 32, 47, 63, 83$.

If $A = \left(\frac{1}{0.4}\right) + \left(\frac{1}{0.04}\right) + \left(\frac{1}{0.004}\right) + \dots$ up to $8$ terms,then what is the value of $A$ (in $.5$)?

$1, 6, 27, 108, \dots$

In the following number series,a wrong number is given. Find out that wrong number.
$4\quad2\quad3.5\quad7.5\quad26.25\quad118.125$