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
61
71
73
81
Answer: Option
Explanation:
Each of the numbers except 81 is a prime number.
Discussion:
61 comments Page 4 of 7.

Sivezh said:   3 months ago
None of them except 81 are perfect squares. So, it will be the right answer.

Ikram said:   1 decade ago
I agree with praveen.

Vikash said:   1 decade ago
Ya dude you are right

41+2=43
43+4=47
47+6=53
53+8=61
61+10=71
71+12=83

So 81 doesn't fit in the series.

Vidya said:   1 decade ago
I agree with Vikash.

MYTHILEE VELU said:   1 decade ago
I Aree with vikash and vidya.

Asha said:   1 decade ago
Explain what is prime number, I can't understand.

Asha said:   1 decade ago
What is the prime number?

Karthi said:   1 decade ago
Number which is divide by itself and 1.

Chand said:   1 decade ago
Hello in b/w 73 is there na. Why cant 73. ?

Sandeep said:   1 decade ago
I didn't understand
when n=1
then t1=41(1-1)+2(1)
=41(0)+2
=0+2
then t1=2
then how come t1=43?

Please explain .


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