How many times in a given day, minutes and hour clock comes in a straight line ?

Below toothpicks/matchsticks indicate the group of fishes moving from west to east direction. Can you make them move from east to west by just moving three toothpicks/matchsticks?

What do you think with the below Picture ?

Can you count the number of triangles in the picture below?

In 1990, a person is 15 years old. In 1995, that same person is 10 years old. How can this be?

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?

What is the four-digit number in which the first digit is one-third the second, the third is the sum of the first two, and the last is three times the second?

Can you count the number of blocks in the picture below?

It has horns but can’t beep. It is like to bleat but It is not a sheep. What is it?

You find yourself in a strange place guarded by two guards.One of the guard always say truth while other always lies.You don't know the identity of the two.You can ask only one question to go out from there. What should you ask?