Yesterday I fell from 30 feet high ladder but I don't get hurt. Why?

When you say goodbye, I am what you need to tie.
I come as a couple and go wherever you run.
Who am I?

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?

Can you find the least possible number such that

If the number is divided by 3, it gives the remainder of 1;
If the number is divided by 4, it gives the remainder of 2;
If the number is divided by 5, it gives the remainder of 3;
If the number is divided by 6, it gives the remainder of 4.

Can you place three balls such that the equation shown in the picture holds true?

Which tank will fill first?

Identify the 10 differences between the two given pictures.

During which month do people sleep the least?

In the image given, you can find several triangles. Can you count them all?

Can you place six X (crosses) in below board without making three in a row in any way ?