Aptitude - Numbers - Discussion
Discussion Forum : Numbers - General Questions (Q.No. 1)
1.
Which one of the following is not a prime number?
Answer: Option
Explanation:
91 is divisible by 7. So, it is not a prime number.
Discussion:
116 comments Page 2 of 12.
Anumoju sri ram said:
1 year ago
The prime number definition: the numbers which is divisible 1 and itself. or the number contains only 2 factors are prime numbers.
A.31 = 1,31 only 2 factors so it is a prime number.
B.61 = 1,61
C.71 = 1,71
D.91 = 1,7,13,91 In this option D there are more than 2 factors.
And 91 divisible 7 which is 13.
91/7= 13,
so, option D is the correct answer.
A.31 = 1,31 only 2 factors so it is a prime number.
B.61 = 1,61
C.71 = 1,71
D.91 = 1,7,13,91 In this option D there are more than 2 factors.
And 91 divisible 7 which is 13.
91/7= 13,
so, option D is the correct answer.
(43)
Ajeejul said:
2 years ago
91 is the correct answer.
(19)
Keshav said:
2 years ago
How to find the prime number?
(54)
Amare muluken said:
3 years ago
Thanks all for explaining the answer.
(14)
Kakrla mallikarjuna rao said:
3 years ago
I think B is the correct answer.
(10)
Vishala said:
4 years ago
Thank you all for explaining the answer.
(21)
Nishu said:
4 years ago
@All.
Thank You so much, it was very helpful to me.
Thank You so much, it was very helpful to me.
(9)
Jaanu Jaanu said:
4 years ago
Thanks both of you for the clear explanations. @Hafiz and@ Dilip.
(7)
Monisha Mohanan said:
5 years ago
@All.
Prime number means that a number that is divisible only by itself and 1
Examples : 2,3,5,7,11.
Now in our question the options s 31, 61,71 and 91 here I think in our example we can find that the prime numbers only start with 2,1,3,5,7.
Thus the answer becomes 91.
Prime number means that a number that is divisible only by itself and 1
Examples : 2,3,5,7,11.
Now in our question the options s 31, 61,71 and 91 here I think in our example we can find that the prime numbers only start with 2,1,3,5,7.
Thus the answer becomes 91.
(63)
Jitu said:
5 years ago
Why only 91 is not a prime number?
In this case, 71 is also divisible by 3.
In this case, 71 is also divisible by 3.
(13)
Post your comments here:
Quick links
Quantitative Aptitude
Verbal (English)
Reasoning
Programming
Interview
Placement Papers