# Aptitude - Odd Man Out and Series - Discussion

Discussion Forum : Odd Man Out and Series - Pick Wrong No. (Q.No. 1)
Directions to Solve
Find out the wrong number in the given sequence of numbers.

1.
582, 605, 588, 611, 634, 617, 600
634
611
605
600
Explanation:
Alternatively 23 is added and 17 is subtracted from the terms. So, 634 is wrong.
Discussion:
38 comments Page 2 of 4.

Vivek Mishra said:   6 years ago
If we add 6 to every alternate number the alternate number comes same except 600.

Eg- 582 (1st number) +6 = 588 (3rd number).
605 (2nd number) +6=611 (4th number).
(4)

Tilak Raj said:   6 years ago
Very good, thanks for the explanation.

Rabi kumar said:   6 years ago
There is two series of alternate numbers, we can separate it like:

582, 605, 588, 611, 634, 617, 600

1). 582, 588, 634, 600
2). 605, 611, 617

In each number, we add 6 we get next number, ex- 582+6= 588, 588+6= 594, 594+6=600, So here in series it is given 634 instead of 594. So odd number is (634) answer.

Balan said:   6 years ago
582-605=23,
605-588=17
588-611=23
634-617=17
611-634=23

So balance 17 +17 =34
Add balance no is 600 +34 =634 ans.
(1)

Lakshay said:   6 years ago
Alternatively 23 is added and 17 is subtracted from the terms. So, 634 is wrong.

Sai said:   7 years ago
Answer 617 only prime number in the given series.

P. ganesan said:   7 years ago

Chinmay said:   8 years ago
One of the obvious reasons I think is that 617 is prime and all others are composite. Why didn't anybody see this? It is I suppose a stronger reason than simple adding and subtracting.

Saptarshi Nag said:   9 years ago
If the given explanation is assumed right then the sequence comes like 23, -17, 23, 23, -17, -17. In this case I think that also 600 is odd one.

Tushar said:   9 years ago
@Shashank why you take 6 please tell me?