There is one thing that goes round the house and also inside the house but never even share a brief touch. What is it?

A man fell off a smuggling boat into deep water. He could not swim and he was not wearing anything to keep him afloat. It took 30 minutes for the people on the boat to realize someone was missing. The missing man was rescued two hours later on the return trip. Why didn't he drown? Note:- He didn't know swimming, the sea was deep, and He wasn't holding anything

Considering the below equation:

V + II - VI = 10
IV - X + VIII = 20
IV - VII + VI = 30

Then, I + II + III = ?

Which of the below owl is odd one out?

A mother bought three dress for her triplets daughters(one for each) and put the dresses in the dark. One by one the girls come and pick a dress.
What is the probability that no girl will choose her own dress?

It has a long neck, A name of a bird, Feeds on cargo of ships, It's not alive,

What is it?

You may enter, but you may not come in. I have space, but no room. I have keys, but open no lock. What am I?

Our product and our sum always give the same answer. Who are we?

A mathematician couple was having a Frappuccino in Starbucks sitting opposite to each other. Suddenly the guy noticed the text written on the paper in front of them and exclaimed that it was wrong. The girl denied it and said it is appropriate. Both are correct. What is written on the paper?

Make eight squares by moving only two matchsticks.
Note- Square can be of different sizes.