Three in a row

Hello LLs,
I today have come up with three interesting puzzles which are not as tough as they are expected to be. And probably, this is the reason that I am giving you three puzzles to solve. What you are supposed to do is solve three puzzles at a stretch, in as less time as possible. On the basis of survey I did with my fellow mates and friends, an average person will require five and a half minutes to solve all the puzzles together. One of the persons solved all three puzzles in just two minutes and twenty seconds. I hope you all can cross these puzzles in as less time as possible. All the best.

Puzzle #1:

There are three friends Sachin, Rahul and Saurav, who are talking about Anil. They all had been to painting exhibition and these are the statements they made.
Sachin: Anil has bought at least four Paintings.
Rahul: Anil has bought less than four Paintings.
Saurav: Anil has bought at least one Painting.

Only one of them is speaking truth.

Now, you have to guess the number of paintings Anil has bought.

Puzzle #2:

In my bedroom there are 20 black, 20 white, 30 red and 15 blue socks available. I went inside my room and it is all dark and no electricity available. Now, I need to have two pairs of Socks for my road trip. All socks of same colour are exactly same. 

You have to tell me that in all how many socks should I take outside my room that I will surely have two pairs of Socks. These two pairs can be of the same colour or the different colour. But in the same pair, socks have to be of same colour.

Puzzle #3:

Ravi and Sunil were sitting on the bank of the river. Ravi takes certain number of stones and hides in his pocket. Ravi then tells Sunil that he has certain stones, total number is either 1 or 2 or 3.

Sunil has to ask one question and determine the number of stones. He can ask the question and Ravi will answer in Yes, No or Don't know. What will that question be?

Enjoy. And don't forget to note the time. Signing off!