Passwords

Question: A man works at a high security facility. He goes to work in the morning on his computer. He types in his password, but it is incorrect. He remembers that the password changes every month, so he calls his boss. The man says, “Boss, the old password is out of date.” The boss replies, “Yes, the new password is different. But if you listen closely, you will figure it out. It has the same amount of letters, but no spaces.” The man thanks the boss and types the password in immediately. What was the new password and the old password?

Question: People see through me, but none pass through without killing me. I can be anywhere, and can be seen double or single. What am I?

Question: What can be broken but never forgotten?

Question: Which thing that comes once in a year, twice in a week?

Question: You are trying to get your chicken, fox, and wheat to the barn. However, the barn is on the other side of the river. You are on a boat and can only transport one animal or wheat at a time. You must choose carefully not to leave the wrong two together, though. It's either the fox will eat the chicken or the chicken will eat the wheat. How do you take each thing across safely?

Question: During what month do people sleep the least?