Logic Riddles

Question: What's small like a mouse but protects like a lion?

Question: At work a lady is requested to move a 2 ton machine with out any assist.How is she able to move the item?

Question: A guy writes in his journal. He writes "Hey, journal, today I... 'Dinner is ready!' Is what his wife said." But the guy had no wife. How is this possible?

Question: Suppose you had to pick 1 of 3 doors to go through. One has ninja assassins, one has a lion that hasn't eaten in 3 months, and one has a flaming inferno. Which door should you choose in order to live?

Question: Decapitate me and all becomes equal. Then truncate me and I become second. Cut me front and back and I become two less than I started. What am I?