Choose the number which is different from others in the group

ANSWER: 6482

Explanation:
In all other numbers, the sum of digits is 29. In option C (6482), the sum of digits is 20.

Sum Calculations:

• Other numbers: 6 + 7 + 8 + 8 = 29, 6 + 8 + 7 + 8 = 29, 9 + 8 + 4 + 8 = 29

• Option C (6482): 6 + 4 + 8 + 2 = 20