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

When we see 2 but call 10?

Can you find a number that lies one third of the distance between 1/3 and 2/3?

Suppose we lay down two cups in front of you. One of the cups is filled with tea and the other one with coffee. Now we ask you to take a spoonful of tea and mix it with the coffee. At this moment, the coffee cup has a mixture of tea and coffee. You have to take that mixture (spoonful) and add it back to the tea.

Can you now tell if the cup of coffee has more tea or the cup of tea has more coffee?

A bag contains 64 balls of eight different colours. There are eight of each colour (including red). What is the least number you would have to pick, without looking, to be sure of selecting 3 red balls?

What's the only room from which no one can enter or leave

What is next number in the pattern below:

131 517 192 123 ?

Can you name some countries which do not have the alphabet 'A' in them?

At a Society election for president, precisely 963 votes were cast.
There is a total of 4 candidates that participate in the election.

The winning candidate exceeds the opponents by 53, 79 and 105 votes.

How many votes do each candidate gets?

Rectify the following equality 101 - 102 = 1 by moving just one digit.