What is full of holes but still holds water?

Solve below rebus puzzle?

How many pluses should we put between the digits of 987654321 to get a total of 99, and where?

You can see it everyday, But cannot touch it at will. What is it?

The person who makes it has no need for it; the person who buys it has no use for it. The person who uses it can neither see nor feel it. What is it?

A famous swimmer can swim downstream in a lake in exactly 40 minutes with the lake current.
He can swim upstream in that lake in exactly 60 minutes against the lake current.
The length of the lake is 2 km.

How long he can cover the distance of one side at a still lake with no current?

I never stop running even when I standstill. If I am formed by joining two identical bodies together, can you guess who I am?

Solve this tricky question. You are trapped in a forest. With you, you have a gun preloaded with two bullets in it. In front of you, there is a tiger, a leopard and a jaguar.

How do you survive?

In the image below, you can see two glasses and two matchsticks.You need to move four matchsticks in such a manner that the crosses come inside the glasses. Note: you cannot move the crossed.

Can you fill the blank with the correct number?

6 30 870 756030 _____