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

Can you count the number of children in the picture below

There are two insects on a tile. Insect X is sitting on one side of the tile (point A) and Insect Y is sitting opposite on the other side of the tile (point B). Now both of them decide to change their position and thus X starts crawling to point B and Y starts crawling to point A. When they meet and pass each other in between, X takes 20 seconds to reach B and Y takes just 5 seconds to reach A.

Can you calculate the total time each of the insects took to change their positions?

Can you place three balls such that the equation shown in the picture holds true?

Can you find the six hidden animals in the picture below?

Can you name any English verb that becomes its past tense by simply rearranging the alphabets ?

You are presented with three boxes. One of them has a red ball inside and the other two have a black ball inside each of them. You are asked to pick up the one with red ball and you pick one. Now, one of the other boxes is opened and it is found to have a black ball.

You are presented with a chance to change your box with the one that is left closed. Will you change your box? Why or why not?

The day before yesterday I was 25 and the next year I will be 28. This is true only one day in a year. What day is my birthday?

The more of this there is, the less you see. What is it?

I have a hole in my back and legs I lack.
I live where I can’t breathe and I eat without teeth.
What am I?