Best easy riddles

Some days you think i'm pretty, but some days you think i'm ugly. Some days you'll love me, but some days you'll hate me. If you think i'm not good enough, you might get rid of me. Who am I?

What jumps when it walks and sits when it stands?

Presume that you do not know what a rhino looks like. Now the question goes like this: If one day while walking in a forest with two of your close friends, one friend shows you an elephant and tells that this is a rhino, and another friend shows you a hippopotamus and tells you that this is rhino, who would you believe and why?

If a blue house is made out of blue bricks, a yellow house is made out of yellow bricks and a pink house is made out of pink bricks, what is a green house made of?

A lawyer, a plumber and a hat maker were walking down the street. Who had the biggest hat?

I live in a house. Each Halloween I stand in a jack-o-lantern and get shorter as I grow old. What Am I?

What did the dog say when he sat on sandpaper?

What makes grown men cry, but humanity would go extinct without it?

The red house is on the white street, and the blue house is on the red street. Where is the white house?

I never ask questions, but always answered. What am I?