What has six faces, but does not wear makeup, has twenty-one eyes, but cannot see? What is it?

A river should be crossed by a father, a mother and their two sons and two daughters.
There are some rules that should be followed while crossing the river. There can be only two people in the raft while crossing. The daughters cannot be with their father unless there is the presence of the mother. The sons cannot be with their mothers unless the father is present. Unless the guard is on the board, the criminals cannot be with any of the family members. Only the adults like the father, the guard, and the mother knows to use the raft.

How will they cross the river?

I am weightless, but you can see me. Put me in a bucket, and I'll make it lighter. What am I?

Which point will the car reach to go out?

Your last good ping-pong ball fell into a narrow metal pipe embedded one foot deep in concrete.
How can you get it out undamaged, if all the tools you have are your tennis paddle, shoe laces, and plastic water bottle, which does not fit into the pipe?

Replace the question mark with the correct number in the below-given picture?

When I asked a girl's name she told me her name is the date '07/09/2001'.

I thought for a few seconds and then I got her name. Do you?

There are 2 people near the river and both of them want to get on the other side. The boat can only take one of them. But they got across.
How?

In particular commonwealth games, a female participant won silver and gold medals for a single event.

How can this be possible?

An office is divided into 8 cubicles. How many of the cubicles are painted if only 1/8 of the cubicles are painted?