Identify the number that does NOT belong to the given series of numbers.
46, 31, 22, 17, 30, -32, -89, —179

Correct option is B

Given series: 46, 31, 22, 17, 30, -32, -89, -179
46 → 31: The difference is -15.
31 → 22: The difference is -9.
22 → 17: The difference is -5.
17 → 30: The difference is +13 (this breaks the decreasing pattern).
30 → -32: The difference is -62.
-32 → -89: The difference is -57.
-89 → -179: The difference is -90.
There seems to be a decreasing pattern (with a difference decreasing by a progressively smaller amount) until 30. This number disrupts the logical flow, as the previous differences were all negative but suddenly there is a positive difference of +13 between 17 and 30.
Conclusion: The number that does not belong to the series is 30.
So, the correct answer is: (b) 30.