What should come in place of the question mark (?) in the given series?
673 670 664 655 643 ?
Show answer & explanation
Correct answer: D
Explanation
The correct answer is option 4, i.e., 628.
673 - 3 = 670 , 670 - 6 = 664 , 664 - 9 = 655 , 655 - 12 = 643, 643 = 15 = 628