4800, 2400, 600, 100, 12.5, ?
Find the missing number in the following number series.

The correct option is 1.25.

To find the missing number in the given series, let us observe the pattern followed by consecutive terms:

First term = 4800
Second term =
$4800÷2=2400$
Third term =
$2400÷4=600$
Fourth term =
$600÷6=100$
Fifth term =
$100÷8=12.5$

Notice that each term is obtained by dividing the preceding term by consecutive even numbers (2, 4, 6, 8, 10, ...).

Following this logic, to find the next term, we divide the fifth term by 10:

$\text{Missing number}=12.5÷10=1.25$

Hence, the missing number in the series is 1.25.