UPSC
Government Jobs Exams
Which of the following is the odd
one?
(a) 31
(b) 41
(c) 51
(d) 61
Read Solution (Total 12)
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- Nice question....
As far as I can see...51 is the odd one out!!
31=Prime Number.
41=Prime Number
51=3*17 (Not a prime Number)
61=prime Number.
- 11 years agoHelpfull: Yes(8) No(0)
- c)51...since it is not a prime
- 11 years agoHelpfull: Yes(0) No(1)
- 51 is the answer because all other numbers are not divisible by three except 51
- 11 years agoHelpfull: Yes(0) No(0)
- 51. because it is only not a prime no. among all.
- 11 years agoHelpfull: Yes(0) No(0)
- 51 As it is a composite number except other.
- 11 years agoHelpfull: Yes(0) No(0)
- a,b and are prime but 51 is not(divisible by 3)
- 11 years agoHelpfull: Yes(0) No(0)
- all r prime numbers except 51...
- 11 years agoHelpfull: Yes(0) No(0)
- C) 51
17*3=51 - 11 years agoHelpfull: Yes(0) No(0)
- ans: c
because except 'c' all are prime no. - 10 years agoHelpfull: Yes(0) No(0)
- 51 as all of them are odd numbers
- 10 years agoHelpfull: Yes(0) No(0)
- 51 is the answer becz 51 is nt a prime number
- 8 years agoHelpfull: Yes(0) No(0)
- 51
all r prime except 51 - 8 years agoHelpfull: Yes(0) No(0)
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