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

The average age of 10 members of a committee is the same as it was 4 years ago, because an old member has been replaced by a young member. Find how much younger is the new member ?

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?

A bomb goes off.
Carnage.
One person, only a few feet away, survives! How can this be?

The person who makes it has no need for it. He who purchases it does not use it. The person who does use it does not know they are. What is it?

Find out the missing number in the picture attached:

If,
29 - 1 = 30
9 - 1 = 10
14 - 1 = 15

Based on similar logic, Can you prove that the below algebraic equation is true?
11 - 1 = 10 ?

If I remove one from eleven it becomes Ten and if I remove one from nine also becomes Ten. How?

Identify the 10 differences between the two given pictures.

Find out the number of circles in the given picture having Illusion