You are presented with three boxes. One of them has a red ball inside and the other two have a black ball inside each of them. You are asked to pick up the one with red ball and you pick one. Now, one of the other boxes is opened and it is found to have a black ball.

You are presented with a chance to change your box with the one that is left closed. Will you change your box? Why or why not?

Mother's Name is Mrs. SIXTY TWO
Son's Name is FIFTY TWO
Daughter's Name is FORTY TWO
What is Name of Father?

I have a clock(12-hour format) and both the needles of the clock overlap at 12:00.
After how much time, they will overlap again?

Your mother’s brother’s only brother-in-law is asleep on your couch. Who is asleep on your couch?

I am lying and I always lie. Tell me whether I am lying or telling the truth.

Is the statement valid that it does not matter how much older a sibling is, eventually the younger one will be half as old as the older one?

I am a five-letter word and people eat me. If you remove the first letter I become an energy form. If you remove the first two letters, I am needed to live. Scramble the last three letters and I am a drink. What word am I?

Alpha is Beta's sister.

Gamma is a Beta mother.

Delta is Gamma's father.

Tango is Delta's mother.

Then,

How is Alpha related to Delta?

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

What will you call your mother's brother's brother-in-law?