Good Riddles

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: I fasten to walk,
and unfasten to stop.

What am I?

Question: I can pogo on the moon, but not Mars. I can pogo on this table, but not on a stick. What can assure us to be able to pogo on objects at all times?

Question: When i was 4 my sister was half my age. Now I am 100. How old is my sister now?

Question: A lady just married a man. They do not have enough money to stay in a decent hotel. The couple stays with the man's mother. The man's mother has a jar full of lima beans, the lady's favourite food. The lady takes one lima bean each day they stay. The man's mother suspects the lady's theiving, but does not say a word. One day, the man's mother and wife are cleaning the kitchen together. The lady sees the man's mother looking at her eying the jar, now half full of lima beans. The lady finds one on the counter top and holds it up to the man's mother. She says three words that relieves the man's mother's suspection. What are those three words?