What will come in the place of question mark (?) in the following number series?
3, 6, 18, ?, 630, 6930

The correct answer is 90 (Option 3).

To find the number that replaces the question mark (?), let's analyze the pattern and relation between consecutive terms in the given series:

Series: 3, 6, 18, ?, 630, 6930

Let's look at the multiplication factor between each consecutive pair of numbers:

First term to second term:
$3\times 2=6$

Second term to third term:
$6\times 3=18$

We can observe that each term is being multiplied by consecutive increasing integers ($\times 2$, $\times 3$, $\times 5$, etc., which are prime numbers/increasing factors).

Following this pattern, the next multiplier after 3 should be 5:

Third term to fourth term (?):
$18\times 5=90$

Now, let's verify if 90 satisfies the remaining terms of the series:

Fourth term to fifth term:
$90\times 7=630$

Fifth term to sixth term:
$630\times 11=6930$

The sequence of multipliers is 2, 3, 5, 7, 11, which are prime numbers in increasing order.

Thus, the missing number in place of (?) is 90.