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

What is full of holes but still holds water?

Which city is three-fifths chick two third cat and 50% goat?

What breaks yet never falls, and what falls yet never breaks?

I don't get anymore wetter, no matter how much rain falls on me.

I have a five and a three-gallon jar. Assuming there is an infinite supply of water, how can I measure one-gallon water?

People are waiting in line to board a 100-seat aeroplane. Steve is the first person in the line. He gets on the plane but suddenly can't remember what his seat number is, so he picks a seat at random. After that, each person who gets on the plane sits in their assigned seat if it's available, otherwise, they will choose an open seat at random to sit in. The flight is full and you are last in line. What is the probability that you get to sit in your assigned seat?

In four steps you need to move the word 'cold' From 'warm' by replacing one alphabet at a time such that every word formed at each step is acceptable in English Dictionary.

Many have heard it, but nobody has ever seen it, and it will not speak back until spoken to. What is it?

In a contest, four fruits (an apple, a banana, an orange, and a pear) have been placed in four closed boxes (one fruit per box). People may guess which fruit is in which box. 123 people participate in the contest. When the boxes are opened, it turns out that 43 people have guessed none of the fruits correctly, 39 people have guessed one fruit correctly, and 31 people have guessed two fruits correctly.
How many people have guessed three fruits correctly, and how many people have guessed four fruits correctly