Question : Direction: In the following question, which number is wrong in the given series?
12439, 23549, 34659, 45769, 57689.
Option 1: 34659
Option 2: 23549
Option 3: 57689
Option 4: 12439
Correct Answer: 57689
Solution : Given:
12439, 23549, 34659, 45769, 57689
The pattern is:
12439
1 + 1 = 2
2 + 1 = 3
4 + 1 = 5
3 + 1 = 4
9 is constant.
Similarly, 23549, 34659
45769
4 + 1 = 5
5 + 1 = 6
7 + 1 = 8
6 + 1 = 7
9 is constant.
i.e 56879 is not eaqual to 57689 .
So, the wrong number in the series is 57689 , and it should be replaced with 56879 to maintain the pattern.
Therefore, the corrected series is:
12439, 23549, 34659, 45769, 56879
Hence, option third is correct.
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