Odd man out: 1236, 2346, 3456, 4566, 5686
Explanation:
he first digits of the numbers from the series 1, 2, 3, 4, 5; the second digits form in series 2, 3, 4, 5, 6;
the third digits form the series 3, 4, 5, 6; while the last digit in each of the numbers in 6.
So, 5686 is wrong and must be replaced by 5676.
Hence, option 4 is the correct answer.
By: Amit Kumar ProfileResourcesReport error