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#include<iostream.h> #include<conio.h> int main() {         int i,ans=0;     clrscr();     cout<<"\nChoose one number in your mind from 1 to 63 \n";     cout<<"\n1    3    5    7    9    11    13    15 \n";     cout<<"\n17    19    21    23    25    27    29    31 \n";     cout<<"\n33    35    37    39    41    43    45    47 \n";     cout<<"\n49    51    53    55    57    59    61    63 \n";     cou...

#include<iostream.h> int main() { int first_number,second_number,gcd,i; cout<<"Enter First Number : "; cin>>first_number; cout<<"Enter Second Number: "; cin>>second_number; for(i=1;i<=first_number&&i<=second_number;i++) {      if(first_number%i==0 && second_number%i == 0 ) {                      gcd=i;     } } cout<<"Greatest Common Division (GCD):"<<gcd<<endl; return 0; } ******Output****** Enter First Number: 9 Enter Second Number: 24 Greatest Common Division (GCD):3  What is GCD of two numbers?  It means a greatest number which divides both numbers For example: Two numbers are 9 and 24 Numbers which divides both are 1 and 3 in which greatest number is 3 So 3 is the GCD of 9 and 24 Click here for more programs on C++