1. What happened in 1961 that will not happen again for over 4000 + years? 2. A man wanted to enter an exclusive club but did not know the password that was required. He waited by the door and listened. A club member knocked on the door and the doorman said, "twelve." The member replied, "six " and was let in. A second member came to the door and the doorman said, "six." The member replied, "three" and was let in. The man thought he had heard enough and walked up to the door. The doorman said ,"ten" and the man replied, "five." But he was not let in. What should have he said? 3. PERFECT WORD is a word in which ANY one letter could be replaced by another letter to form another word. An example of a 4-letter Perfect Word is CAST because C could be replaced by L to form LAST or A by O to form COST, or S by R to form CART, and T by E to form CASE. Give a 6-letter Perfect Word. 4.Can you find the largest number possible containing any of 9 of 10 digits, considering 0 also a number, that is divisible by 11 without a reminder? Good LUCK!