You can answer something like this
#include <iostream>
#include <ctime>
int randRange (int low, int high)
{
return rand() % (high - low) + low;
}
int main()
{
int num1, num2;
int num1user, num2user;
num1=randRange(10, 20);
num2=randRange(10, 20);
cout << "Please summation the first number ";
cin >> num1user;
cout << "Please summation the secound number ";
cin >> num2user;
if( num1==num1user && num2==num2user ) cout << "excellent "; else cout << "wrong answer";
cout << "\n first generated number is: " << num1;
cout << "\n second generated number is: " << num2;
return 0;
}