Aptitude - Odd Man Out and Series - Discussion
Discussion Forum : Odd Man Out and Series - Odd Man Out (Q.No. 13)
Directions to Solve
Find the odd man out.
13.
41, 43, 47, 53, 61, 71, 73, 81
Answer: Option
Explanation:
Each of the numbers except 81 is a prime number.
Discussion:
61 comments Page 5 of 7.
Sandeep said:
1 decade ago
Hai friends any can say an easy steps to find like this oddman out problems.
Imran parvez said:
1 decade ago
A number which is divisible by one (i.e 1) and itself (the same number that is given) is called a prime number.
Paresh said:
1 decade ago
41+2=43.
43+4=47.
47+6=53.
53+8=61.
61+10=71.
71+2=73.
73+4=77.
But there is 83, which was not in same sequence. There must be 77.
43+4=47.
47+6=53.
53+8=61.
61+10=71.
71+2=73.
73+4=77.
But there is 83, which was not in same sequence. There must be 77.
Raju said:
1 decade ago
Hey how you express above formula in to the sum. tn=t (n-1) +2n.
For example =41 (1-1) +2*1=2.
For example =41 (1-1) +2*1=2.
Ikram said:
1 decade ago
I agree with praveen.
Praveen said:
1 decade ago
I am not agree with Vikash and ankita as according to them 73 and 81 both will be the answer.But we have to choose one answer.So correct answer is 81 which is not a prime number
Yogesh Rai said:
1 decade ago
4*10+1, 7*6+1, 6*8-1, 6*9-1, 6*10+1, 7*10+1, 8*9+1,
but there are 9*9= 81
but there are 9*9= 81
Saurabh said:
1 decade ago
What is prime no?
Shantanu said:
1 decade ago
Hey people it should be 73 also..... because in each case 2 is getting added and in that case 73 doesn't fit!!
Sunitha said:
1 decade ago
Thank you ankita.
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