What should come in place of the question mark (?) in the given series?
121 32 −57 −146 −235 ?

The given series is:
121, 32, -57, -146, -235, ?
Logic: -89
32 - 121 = -89
-57 - 32 = -89
-146 - -57 = -89
-235 - 146 = -89
So, the pattern is that each number decreases by 89.
To find the next number, subtract 89 from -235:
-235 - 89 = -324

Correct answer is (b)  -89