Question: What arrives at the end and can occur several times a day, once every month, or last millions of years?
Answer: A period (at the end of a sentence, class periods during the school day, a menstrual cycle, and a geological era).
Question: Surrounded by life , yet life is its biggest enemy. But without life there is no need for it to exist. What is it?
Answer: A ship or a boat. Life here is the ocean.
Question: During what month do people sleep the least?
Answer: February, it's the shortest month after all.
Question: When is 99 more than 100?
Answer: A microwave.Generally when you run a microwave for '99' it runs for 1 minute and 39 seconds. '100' runs for 1 minute.
Question: The more you add, the less it weighs.
Question: What makes a hotel hot even when below zero temperatures?
Answer: Taking away 'el'.