# Aptitude - Odd Man Out and Series - Discussion

Discussion Forum : Odd Man Out and Series - Find Wrong No. (Q.No. 6)
Directions to Solve
Find out the wrong number in the series.

6.
19, 26, 33, 46, 59, 74, 91
26
33
46
59
74
Explanation:

Go on adding 7, 9, 11, 13, 15, 17 respectively to obtain the next number.

So, 33 is wrong. It must be 35

Discussion:
14 comments Page 1 of 2.

Mohamed Abdul Raseeth said:   2 years ago
@Jainik.

Nice, Thanks for solving.

Jainik said:   4 years ago
(19+33)Ã·2= 26
(33+59)Ã·2= 46
(59+91)Ã·2 = 75
So, 74 is the wrong term.

Mukesh said:   6 years ago
Ans is 74.

26-19=07
33-26=07
46-33=13
59-46=13
74-59=15
91-74=17
So ans is 74.
(3)

Lakshu said:   6 years ago
I hope 33 is not the correct answer. Because subtract the digits we get the series of 7, 7, 13, 15, 17.

So 15 is not a prime number. 74 should not be there. Please explain.

Kamoo said:   7 years ago

Hi, @Hamsa's comment:

I believe 33-10=23 but you have given 33-10=13.

Hamsa said:   9 years ago
19-10 = 9 perfect sqr (3*3).
26-10 = 16 perfect sqr (4*4).
33-10 = 13 not a perfect sqr.
46-10 = 36 perfect sqr (6*6).
59-10 = 49 perfect sqr (7*7).

So 33 is odd.
(3)

@Ayaush.

There should be having some regularity in the series. Just adding 7 twice & dn suddenly jumping to add 13 twice & dn 15 twice doesn't make any sense/regularity.

So 91 can't be taken as answer but 33 is the correct answer.

19+7 = 26.
26+9 = 35.
Instead of 35, it given 33. So it is wrong.
35+11 = 46.
46+13 = 59.
59+15 = 74.

19 + 7 = 26
26 + 7 = 33
33 + 13 = 46
46 + 13 = 59
59 + 15 = 74
74 + 15 =89

so why 91 is not false???
(1)