No information is given.

The 4-digits add up to four.

The digits are all even and the 4th digit is 0.

The digits in a random order are 1, 2, 3, and 4.

The first two numbers are 5. Also, 9 and 2 aren't in the code.

The first digit is either 1 or 2, the second digit is either 3 or 4, the third digit is either 5 or 6 and the last digit isn't 0.

None of the digits are prime numbers.

The 4-digits add up to thirty-four.

The 4-digits are never use the same number twice.

The third number is the sum of the first and second numbers and the fourth number is zero.

The first three digits are all 9 and the fourth digit is different from the rest.

The first digit isn't 6. Also, 4 isn't in the code.

The digits in a random order are 1, 3, 7, and 9. except the numbers never cross diagonally if displayed on a number pad.

The code uses only numbers with five letters.

The code uses only numbers with four letters.

The 1 and 0 are the only numbers in the code. They are both used at least once.

The code uses 8 and 3 at least once. Also the code does not include 4 or 5.

The code uses a 1 followed by a 0. The first digit isn't 1.

The code uses the 3 number exactly three times.

The first digit is either 1 or 2, the second digit is either 3 or 4, the third digit is either 5 or 6 and the last digit is either 1, 2, 3, 4, 5, or 6.

None of the 4-digits use a number containing the letter 'e'. The 4-digits don't all share the same number.

The code uses a 5 and a 9 exactly once. 7 is not in the code.

The first digit is a lower number than the last digit. The second and third digit is both 5.

The first digit is a higher number than the last digit.

The first and second digit have a higher sum than the sum of the first and third digit. The last digit is either 7 or 8.

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