Prime numbers

Number Theory Level 2

How many prime numbers are there in between 1 to 100.


The answer is 25.

Aashish Patel by Aashish Patel , 20, India

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3 solutions

Prime numbers between 1-100 are as follows-2,3,5,7,11,13,17,19,23,29,31,37,41,43,47,53,59,61,67,71,73,79,83,89&97

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Hà Vĩnh Đạt
Apr 5, 2014

Just run this program : "bool isPrime(int n) { if (n < 2) return false; for (int i = 2; i < n; i++) if (n % i == 0) return false; return true; } void main() { int c = 0; for (int i = 1; i <= 100; i++) if (isPrime(i)) c++; cout << c; } "

1 Helpful 4 Interesting 1 Brilliant 2 Confused

I also did the same. I wrote a C code to do that.

Abhijnan Saraswat Gogoi - 8 months ago
Aashish Patel
Mar 22, 2014

You can simply count the prime numbers by doing divisibility test.

0 Helpful 1 Interesting 0 Brilliant 1 Confused

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