Which of the following groups does not follow the same arithmetic rule?
Show answer & explanation
Correct answer: A
Explanation
The correct answer is option 1 i.e. 10, 20, 40.
Logic: 1st number × 3 = 2nd number, 2nd number × 3 = 3rd number
Except "10, 20, 40", all number pairs follow the same logic.