Comments

• Your best bet is to post your attempt and ask people to help you make it work properly. It's unlikely anyone will write the program for you from scratch.

  in write a C++ program given below? Comment by siamesescythe June 2021
• negative number minus positive number equals negative number.

  in What does a minus minus a plus equal? Comment by siamesescythe June 2021
• Keep dividing by prime factors until you can't any longer. 612 = 2 * 306 = 2 * 2 * 153 Note that 1+5+3 is divisible by 3 = 2 * 2 * 3 * 51 Note that 5+1 is divisible by 3 = 2 * 2 * 3 * 3 * 17 17 is prime, you are done.

  in Factor into prime factors? Comment by siamesescythe May 2021
• gcd(1,20) = 1 so 1 and 20 are coprime.

  in Is (1,20) co prime number? Comment by siamesescythe May 2021
• gcd(1,20) = 1 so 1 and 20 are coprime.

  in Is (1,20) co prime number? Comment by siamesescythe May 2021
• Keep dividing by prime factors until you can't any longer. 612 = 2 * 306 = 2 * 2 * 153 Note that 1+5+3 is divisible by 3 = 2 * 2 * 3 * 51 Note that 5+1 is divisible by 3 = 2 * 2 * 3 * 3 * 17 17 is prime, you are done.

  in Factor into prime factors? Comment by siamesescythe May 2021