Easy riddles

Before Mt. Everest was discovered, what was the highest mountain in the world?

I go in hard. I come out soft. You blow me hard. What am I?

I am a nut with a whole. What am I?

What has four legs, but can't walk?

If you have me, you want to share me. If you share me, you haven't got me. What am I?

Slayer of regrets, old and new, sought by many, found by few. What am I?

There once was an evil wizard. He took 3 women from their homes and turned them into rose bushes that looked exactly alike. He put them in his garden. One of the women had a husband and children and begged the wizard to let her see them. He agreed. At night he brought the woman to her house. In the morning he came and took her home. Next day the husband decided to go rescue her. So he snuck into the wizard's garden. He looked and looked at the 3 identical rose bushes trying to figure out which could be his wife. Suddenly he knew the answer and he took his wife home. How did he know which rose bush was his wife?

I plow and plow, but never sow. What am I?

How many seconds are there in a year?

Poor people have it. Rich people need it. If you eat it you die. What is it?