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:
108 comments Page 5 of 11.
Kaviya said:
1 decade ago
Which number is only divisible by 1 and the same number is called prime number.
Dhruba said:
9 years ago
Sorry, I can't understand. Can anyone explain the answer with an easy method?
Jitu said:
4 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)
Humaun said:
8 years ago
2,5,8- 39 means 23, 29, 53,59,83,89
3-17
6-17
9-7 more easy to memorizing.
3-17
6-17
9-7 more easy to memorizing.
Shilpa said:
10 years ago
1!+2!+.....50!/5!
= (1!+2!+......+50!) /1!+2!+.....+5!
= 6!+7!+....+50!
= (1!+2!+......+50!) /1!+2!+.....+5!
= 6!+7!+....+50!
Kimaya said:
1 decade ago
The simple way is we should know tables to find which is a prime number.
Chandan said:
8 years ago
Identify Prime Number.
11 * 1 = 11.
ODD .N
12=2*6, 3*4, 6*2, 12*1 etc.
11 * 1 = 11.
ODD .N
12=2*6, 3*4, 6*2, 12*1 etc.
Shailesh said:
9 years ago
If the number is divisible by 2 and 3 both, then it is divisible by 6.
Karthick said:
1 decade ago
Thank you santhose:) your idea is too good to identify the prime no.
Priyanka.c(IT) said:
1 decade ago
Prime number is defined as divisible by "itself" and by "one" only.
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