If Bihan is 10, Anirudha is 20, and Kim and Seal are both 5, but Rikold is 10, how much is Kenniger by the same trend?

Andrew’s doctor gives him three pills and tells him to take one every half hour. How much time will have passed by the time Andrew’s taken all three pills?

A kind heart person buy packed food at 3$/packet from United states and sells them at 1$/packet at Africa. After some time he becomes a millionaire.

How come the guy become millionaire ?

If it took eight men ten hours to build a wall, how long would it take four men to build it?

People make me, save me, change me, raise me. What am I?

In 1990, a person is 15 years old. In 1995, that same person is 10 years old. How can this be?

Always in you, Sometimes on you;

If I surround you, I can kill you.

What am I?

There are 2 sand hourglasses.

The small one can measure 5 hours and the large one can measure 7 hours.

How can we measure 16 hours with 2 sand hourglasses running together ?

What's a single-digit number with no value?

Solve this riddle by finding the odd one out from the rest.