What is black when you buy it, red when you use it, and gray when you throw it away?

What does this mean?

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What breaks yet never falls, and what falls yet never breaks?

What does a man do only once in his lifetime, but women do once a year after they are 29?

Which Travels Faster? Solve below famous picture riddle:

Here is a conversation between a couple who both are software professionals.

Husband: Hey! What is your date of birth?
Wife Replied Angrily: It is 591062400
Husband after doing some calculations replied, "Got It".

What is the DOB of the wife?

A landlord calls both of his sons and tells them that their horses will now decide who will transfer the inheritance. He tells them to race along the land till the end and the one whose horse will be slower will win and be the heir to all the property.

Both of them keep wandering for days but to no result. Then they ask a wise man regarding it. The man advises them on the matter after which they jump on the horses and race as fast as they can till the end. Why did they do it?

What did the wise man say?

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?

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

I make a loud sound when I’m changing. When I do change, I get bigger but weigh less. What am I?