`Python` 1. Decimal to Binary: Using bin(), a decimal number is converted to binary. 2. Binary to Decimal: The int() function with base 2 converts a binary string to a decimal number. 3. Decimal to Octal: The oct() function converts a decimal number to octal. 4. Octal to Decimal: The int() function with base 8 converts an octal string to a decimal number. 5. Decimal to Hexadecimal: The hex() function converts a decimal number to hexadecimal. 6. Hexadecimal to Decimal: The int() function with base 16 converts a hexadecimal string to a decimal number. Each conversion demonstrates how Python's built-in functions can easily handle number system transformations.