Find the odd one out from the following sequence:
$10, 25, 49, 81, 121$

Find the next term in the series: $1, 5, 13, 25, 41, ?$

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 $.5$)?

$1, 5, 11, 19, 29, ?$

Find the odd number in the given sequence: $6, 7, 16, 41, 90, 154, 292$.

$980, 484, 236, 112, 50, ?, 3.5$