What is number 24 of the impossible?

How old is the Sierra Madre Occidental? Do you have to start at the beginning of the level in Halo 3 to earn the achievement that you beat it? What stops gamma radiation? What actors and actresses appeared in Mei gui wo ai ni - 1966? How many years of training does it take to be a dietitian? Is the name Carolyn mentioned in the Bible? What size windshield wipers for a 2001 Toyota Corolla? What nations did the Indian Tecumseh lead? Is manxome a noun? What is the process the moon goes through to become dark? Why do nations benefit from world trade? What country was the song walking in a winter wonderland written? Is there a 5-Phase Uninterruptible Power Supply? How do you change a damaged door lock on the passengerside door on an astro van? If zoology has nothing to do with dentistry then why does the school you go to say you have take it and it is one of the most important classes for dentistry? What is the main ingredient of Tahini? How do you define incomprehensible vocabularies rapidly while reading? What are Trent Reznor's children's names? What was the name of Patricia and Gavin's son on the movie Why Did I Get Married? What x squared plus 8x-9?

What is number 24 of the impossible?