Step-by-step Solution:

The series is: 30, -5, -45, -90, -145, -195, -255

Differences between consecutive terms:

• -5 - 30 = -35
• -45 - (-5) = -40
• -90 - (-45) = -45
• -145 - (-90) = -55
• -195 - (-145) = -50
• -255 - (-195) = -60

The differences should decrease by 5 each time: -35, -40, -45, -50, -55, -60. However, the fourth difference is -55 instead of -50, indicating an error. The term after -90 should be -90 + (-50) = -140, but it is given as -145. Thus, -145 is the wrong number.

Answer: (A) -145