Find the Number of PrimeNumbers

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AntiviruShahriar
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Re: Find the Number of PrimeNumbers

Unread post by AntiviruShahriar » Mon Dec 20, 2010 4:10 pm

Dipan wrote:@Anti ..52 theke 71.
mind krar ki ase???amio dekhlaM.ami vul chilam...okay........
hidden ta dekhte holee show te click dao......

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leonardo shawon
Posts: 169
Joined: Sat Jan 01, 2011 4:59 pm
Location: Dhaka

Re: Find the Number of PrimeNumbers

Unread post by leonardo shawon » Mon Jan 31, 2011 12:28 am

new type>>
the numbers are greater than 50 and there r 20 numbers.

We know
there are 10 numbers divisible 2..
3 odd numbers will be by 3.
1 odd numbers will be by 5.
1 odd numbers will be by 7.
so,, $(10+3+1+1)=15$ numbers will be divisible by them. So there are 5 prime numbers....
Ibtehaz Shawon
BRAC University.

long way to go .....

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