A certain code word uses numbers 1, 2, 3, 4 and 5.
The numbers are written from left to right.
The numbers correspond to the following conditions:
- The code word can contain a minimum of two numbers. The numbers can be the same or different.
- 1 cannot be the first number in the code word.
- If 2 occurs, it should occur more than once.
- 3 cannot be the last number in the word nor can it be next to last.
- If 1 occurs, 4 must also occur.
- If 2 does not occur, 5 too cannot occur.
Which of the following is the code word?
Answers:
12242532- 3225
43155413