Author's Riddles

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

Question: There are ten children and ten cookies in a jar. Mrs. Suzie needs to give one cookie to each child. The children also want her to keep one cookie in the jar. how is this possible?

Question: I'm tall when I'm young, I'm short when I'm old. What am I?

Question: I don't have eyes, but once I did see. Once I had thoughts, but now I'm white and empty.

Hard to catch (medium)

Question: What is harder to catch the faster you run?

Question: What belongs to you but others use it more than you do?

Question: You will always find me in the past. I can be created in the present, But the future can never taint me. What am I?