Which of the following is/are true?I. For a number to be divisible by 19, multiply last digit by 2 and add it to the rest of the number and the answer should be a multiple of 19.II. For a number to be divisible by 29, multiply last digit by 3 and subtract it to the rest of the number and the answer should be a multiple of 29.

Prime numbers are only divisible by one and by the number itself. When prime numbers are divided by numerals other than one or its exact positive divisor, its product has a remainder or exists as a fraction.