Which of the following numbers will replace the question mark (?) in the given series?
192, 185, 171, ?, 122, 87

To find the missing number in the given series, let us analyze the differences between consecutive terms:

First term to second term:
$192-185=7$ (which is $7\times 1$)

Second term to third term:
$185-171=14$ (which is $7\times 2$)

Following this pattern of subtracting consecutive multiples of 7, the difference between the third and fourth term should be:
$7\times 3=21$

Applying this subtraction to the third term:
$171-21=150$

Let us verify the remaining terms of the series using the same pattern:

Difference between the fourth and fifth term:
$150-122=28$ (which is $7\times 4$)

Difference between the fifth and sixth term:
$122-87=35$ (which is $7\times 5$)

Since the pattern is consistent throughout the series, the missing number that replaces the question mark (?) is 150.