Operations Add-ins Media Links Enter your message:

Hello Eman

The message is encrypted in reverse order as: namE olleH

Enter an integer:

15

The twin prime numbers between 1 and 15 are: (3, 5), (5, 7), (11, 13) *Twin prime: Two prime numbers whose difference is 2. Enter an integer:

4

The factorial of 4 is: 24 *(4! = 4 * 3 * 2 * 1)