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Re: Find the Number of PrimeNumbers
Posted: Mon Dec 20, 2010 4:10 pm
by AntiviruShahriar
Dipan wrote:@Anti ..52 theke 71.
mind krar ki ase???amio dekhlaM.ami vul chilam...okay........
hidden ta dekhte holee show te click dao......
Re: Find the Number of PrimeNumbers
Posted: Mon Jan 31, 2011 12:28 am
by leonardo shawon
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....