107 is a Prime number. A prime number has only 2 factors which are 1 and itself. Composite numbers are everything else except 1 and 0. 1 and 0 are neither prime, nor composite.
YES 5 is a prime number!
31 is a prime number because it is only divisible by 1 and itself.
67 is a prime number. A prime number has only 2 factors which are 1 and itself. Composite numbers are every other positive integer except 1 and 0. 1 and 0 are neither prime, nor composite.
51 is not a prime number as it is divisible by 3. A prime number has only 2 factors which are 1 and itself. Composite numbers are every other positive integer except 1 and 0. 1 and 0 are neither prime, nor composite.
i=2 rem=1 echo "Enter a number" read num if [ $num -lt 2 ] then echo "$num is not prime" exit 0 fi while [ $i -le `expr $num / 2` -a $rem -ne 0 ] do rem=`expr $num % $i` i=`expr $i + 1` done if [ $rem -ne 0 ] then echo "$num is prime" else echo "$num is not prime" fi
YES 5 is a prime number!
#include<stdio.h> #include<math.h> bool is_prime (unsigned num) { if (num<2) // 0 and 1 are composite return false; if (!(num%2)) // 2 is the only even prime return num==2; const unsigned max_div = sqrt (num) + 1; for (unsigned div=3; div<max_div; div+=2) { if (!(num%div)) // the number is composite return false; } // if we get this far, the number is prime return true; } int main (void) { unsigned num; printf ("Enter a positive integer: "); scanf ("%u", &num); printf ("\n%u is %s\n", num, is_prime (num) ? "prime" : "composite"); return 0; }
NUM-ber The stress is on NUM.
31 is a prime number because it is only divisible by 1 and itself.
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67 is a prime number. A prime number has only 2 factors which are 1 and itself. Composite numbers are every other positive integer except 1 and 0. 1 and 0 are neither prime, nor composite.
There are 3 syllables. A - num-ber.
There are two syllables. Num-ber.
#include<iosys.h> #include<math.h> // for sqrt() bool is_prime (unsigned num) { if (num<2) return false; // 2 is the first prime if (!(num%2)) return num==2; // 2 is the only even prime // largest potential factor is square root of num unsigned max = (unsigned) sqrt ((double) num) + 1; // test all odd factors for (unsigned factor=3; factor<max; factor+=2) if (!(num%factor)) return false; return true; // if we get this far, num has no factors and is therefore prime } int main (void) { // test all nums from 0 to 100 inclusive for (unsigned num=0; num<=100; ++num) { if (is_prime (num)) printf ("%d is prime\n", num); else if (num>0) printf ("%d is composite\n", num); else printf ("%d is neither prime nor composite\n", %d); } return 0; }
51 is not a prime number as it is divisible by 3. A prime number has only 2 factors which are 1 and itself. Composite numbers are every other positive integer except 1 and 0. 1 and 0 are neither prime, nor composite.
The LCM is: 60
60% or 60/100 or 6/10 or 0.60