I am white when I am dirty, and black when I am clean. What am I?

I am the fastest animal but cannot climb the tree. What am I?

Can you solve this picture maths equation?

How many times can you subtract the number two from the number fifty?

What jumps when it walks and sits when it stands?

John’s parents have three sons: Snap, Crackle, and what’s the name of the third son?

I get hot but I never sweat,
I cook food but I am not a chef,
I have a door but you can't enter me,
I have a light but I am not a lamp.
Who am I?

I have four wings but can't fly.
I express no emotions.
I am found on the exact spot every time you look.
I keep toiling away with a little sound.

Do you know what am I?

What has six faces, but does not wear makeup, has twenty-one eyes, but cannot see?

I possess a head

I flaunt a tail

But I don't have mouth or legs

Can you find out who I am?