There are nine dots in the picture that has been attached with this question. Can you join all the dots by drawing four straight lines without picking up your pen?

When I go in I might cause pain. I cause you to spit and ask you not to swallow. I can fill your hole. What am I?

A train full of passengers goes through a tunnel. When the train comes out from the other end, there is no single person on the train.

How did it happen?

What is the end of everything?

In my garden, I have many trees but only one of them is the mango tree. In these mango trees, there are some mangoes(as expected).

But after a strong wind, there are neither mangoes on the tree nor on the ground. Explain?

Akbar summoned Birbal out of anger.
He told him that he will have to face death.
He asked him to make a statement and if the statement is true he will be buried alive and if the statement is false, he will be thrown at lions.
After hearing Birbal’s statement, Akbar could do nothing but smile.
He gave him 5 gold bars and let him go.

What did Birbal say?

I have eight fingers and two thumbs but I do not live. What Am I?

Can you solve below mathematical equation?

2^1234 - 2^1233

No matter how little or how much you use me, you change me every month. What am I?

I have branches, but no fruit, trunk or leaves. What am I?