A Small Little Problem

Question

OBJECTIVE:
Write a program that will produce 15 random numbers. Print out, on one line, only the numbers who are divisible by 2, and multiples of 5 in between 10 and 40. Use any logic gates as necessary.
Below is the source code of the program I have attempted to do, but I have one minor problem. In the If statement, It says the number has to be between 10 and 40 in order to print out, but sometimes when i run my program, i see 42, 44 or 45, which are even and divisible by 2 or 5, but not in between 10 and 40. Can anyone please help me? ThankS!
// The "Chap3Program13" class.
import java.awt.*;
import hsa.Console;
public class Chap3Program13
    static Console c;           // The output console
    public static void main (String [] args)
        c = new Console ();
        int num, count = 0;
        c.print ("The random numbers are: ");
        c.println ();
        while (count <= 15)
            num = (int) (Math.random () * 51) + 0;
            if (num % 2 == 0 || (num % 5 == 0 && num >= 10 && num <= 40)
                c.println (num, 6);
            count++;
    } // main method
} // Chap3Program13 class

Answer 1

your code:
if (num % 2 == 0 || (num % 5 == 0 && num >= 10 && num <= 40)says: if number is divisible by two OR all of the following: number is divisble by five and number is greater than 10 and number is less than 40
I don't think this is what you want. I think you want your if condition for between 10 and 40 to be outside the rest of your clauses, as
if ((num >= 10 && (num <=40)) {
  // I know for sure if I am in here that number is in the desired range
  if ((num % 2) == 0) || (num % 5 == 0)) {
    // And if I get to here I know num is both in my range and divisible
    // by 2 or 5 - print it
}Lee