A seven-year-old kid challenged his classmates that he can make the number one disappear by adding something to it.

How can he do that?

Always in you, Sometimes on you;

If I surround you, I can kill you.

What am I?

Find The Next Number in this series.
1, 2, 6, 42, 1806 ?

You along with your friend are standing in front of two houses. Each of those houses inhabits a family with two children.

Your friend tells you the below two facts:
1) On your left is a family that has a boy who likes accounts but the other child loves science.
2) On the right is a family with a seven-year-old boy and a newborn baby.

You ask him, "Does either of the family have a girl?"

To this, he replies, "I am not quite sure. But can you guess that? If you are right, I will give you $500."

Which family do you think is likely to have a girl?

If an electric train is travelling south, then which way is the smoke going?

A wealthy man lives alone in a small cottage. Being partially handicapped he had everything delivered to his cottage. The mailman was delivering a letter one Thursday when he noticed that the front door was ajar. Through the opening he could see the man's body lying in a pool of dried blood. When a police officer arrived he surveyed the scene. On the porch were two bottles of warm milk, Monday's newspaper, a catalog, flyers, and unopened mail. The police officer suspects it was foul play. Who does he suspect and why?

There's one "sport" in which neither the spectators nor the participants know the score or the leader until the contest ends.

What is it?

Twice ten are six of us,

Six are but three of us,

Nine are but four of us;

What can we possibly be?

Would you know more of us?

Twelve are but six of us,

Five are but four, do you see?

What are we?

Solve The below Equation:

ALFA + BETA + GAMA = DELTA

What have one eye but still cannot see?