Can you convert the number zero(0) into a positive number using just one mathematical operator ?

Place the numbers from 1 to 9 in the circles in a manner that each side of the triangle sums up to 17.

In the Mexico City area, there are two Houses H1 and H2. Both H1 and H2 have two children each.
In House H1, The boy plays for Mexico Youth academy and the other child plays baseball.
In House H2, The boy Plays soccer for his school in Mexico and they recently have a newborn.

Can you prove that the probability of House-H1 having a girl child is more than that of House-H2?

The below given figure comprises of a pattern through which you can determine the missing letter. Can you push your mind to find the pattern and add the missing letter?

John buys rice at Rs.60/kg from Britain and then sells them at Rs.5/kg in India. As a result of this, he becomes a millionaire. How come?

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?

If we add four times the age of John four years from now to five times his age five years from now we get ten times his current age.

How old will John be two years from now?

Why did Navjot Singh Sidhu put the new January calendar in the freezer

Can you find the missing number in the third row?
35 20 14
27 12 18
5 2 ?

A pond had 60 fish, out of which, all but 20 died.
How many fishes are now present in that pond?