What always comes into a house through the keyhole?

What happened when the wheel was invented?

Which statement is true out of the following?
One statement here is false.
Two statements here are false.
Three statements here are false.

I am the fastest animal but cannot climb the tree. What am I?

Sherlock Holmes was challenged to make a pre-drawn line smaller without erasing it. He did it in fractions of seconds. How?

Find the next number in the series below

21 32 54 87 131 ?

A man is approaching a broad and barren land. He has a package with him. If somehow, he is unable to open the package before reaching the land, he will die.

Can you guess what is present in the package?

Why is it against the law for a man living in Delhi to be buried in Mumbai?

"That Restaurant always remains crowded. This is the reason why nobody goes there".

Can you find a flaw in this statement?

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?