Aptitude - Numbers - Discussion
Discussion Forum : Numbers - General Questions (Q.No. 60)
60.
How many prime numbers are less than 50 ?
Answer: Option
Explanation:
Prime numbers less than 50 are:
2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47
Their number is 15
Discussion:
4 comments Page 1 of 1.
Koushal patil said:
5 years ago
There is no any formula to get prime number you have to find them all and count.
If you could give any formula the you are supposed to get Turing award.
If you could give any formula the you are supposed to get Turing award.
(3)
Goutam said:
9 years ago
Dear friends,
Share any formula for "calculating the number of a prime number between any 2 numbers (between 5 and 5000)".
Share any formula for "calculating the number of a prime number between any 2 numbers (between 5 and 5000)".
(1)
Samyuktha said:
1 decade ago
Any method for finding prime numbers for a certain range.
Shruti said:
1 decade ago
If u have find prime no. u apply a general method but it is not appropiate and nt valid in some case:
3k+2 if k is odd no.
3k+1 if k is even no.
for ex,3*1+2=5
3*2+1=7
but there is error in when 3*8+1=25
& 3*11+2=35
so if u have another general method to find prime no.
3k+2 if k is odd no.
3k+1 if k is even no.
for ex,3*1+2=5
3*2+1=7
but there is error in when 3*8+1=25
& 3*11+2=35
so if u have another general method to find prime no.
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