What month of the year has 28 days?

If 5 cats catch 5 mice in 5 minutes, how long will it take one cat to catch a mouse?

What jumps when it walks and sits when it stands?

I’m light as a feather, yet the strongest person can’t hold me for five minutes. What am I?

What is more useful when it is broken?

Begin with a word, five letters to my name,
Remove the first and last but I am the same
Take out my middle and still, I remain.
What word am I?

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

I know a nine-letter word having only one vowel.
Do you ?

Always in you, Sometimes on you;

If I surround you, I can kill you.

What am I?

What is the Surname of Barbie Doll?