What is full of holes but still holds water?

The answer I give is yes, but what I mean is no. What was the question?

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

Here is what you have to do. You have to throw a ball as hard as you can but it must return back to you even if it does not bounce at anything. Also, you have nothing attached to the ball. There is no one on the other end to catch that ball and throw it back at you.

How will you do it?

In a supermarket, there is an intelligent glass pane before a refrigerating unit. This glass pane allows cherries and apples through it but does not allow grapes and Orange to pass through it.

Can you identify the rule that the glass pane is following?

I am a word that begins with the letter “i.” If you add the letter “a” to me, I become a new word with a different meaning, but that sounds exactly the same. What word am I?

If,
9 * 8 * 7 = 65
8 * 7 * 6 = 50
7 * 6 * 5 = 37

Find
6 * 5 * 4 = ?

How many minutes are there in Feb 2017?

Note: The shortest answer is the correct answer.

By including only four matchsticks in below picture, you have to make "Four Triangles And Two Squares"

Can you find out what is missing?

1 3 5
2 4 ?

Hint: It's not six. Think out of the box.