What jumps when it walks and sits when it stands

I don't have fins but can swim I have wings but can't fly what am I?

There are 5 people in a family. Who would scratch them all? 

I have one color but not one size 
I’m stuck at the ground yet I easily fly
I’m present in the sun but not in the rain
I don’t feel pain
I don’t hurt others 
What am I 

Appeared in a 1950 IQ test:

8 + 8 % 8 + 8 x 8 - 8 = ?  

A) 64 B) 65 C) 72 D) 80

What has a mouth, but cannot eat; moves, but has no legs; and has a bank, but cannot put money in it?

I carry your blood, but I'm not your child. 
Who Am I?

All men take off their hats to me. 
Who am I?

The thinkers usually hold this body part

It's shorter than the rest, but when you're happy, you raise it up like it's the best. 
What is it?

They come out at night without being called, and are lost in the day without being stolen. 
What are they?

A man dies of old age on his 25 birthday. How is this possible?