It walks on 4 when its young, walks on 2 when it's older, and walks on 3 when its very old?

Four children having five rocks each were playing a game in which they had to throw the rock at a particular solid area in the water. Child 1- Succeeded in throwing three rocks at a solid area but one of the rocks sunk. Child 3 - His aim was so bad that all rocks got sunk. Child 4- He was awesome and none of the rocks got sunk. Child 2 - Was the winner but was struck by a rock in the head and died. Who killed Child 2?

A Scientist was fifty years old in the year 2000 but he was forty years old in the year 2010. How can this be possible?

PS: It has a logical answer.

Our product and our sum always give the same answer. Who are we?

The current time can be represented by below textual rebus.

0
=========
B.Sc
LLB

Can you tell us the current time?

1 dollar = 100 cent
= 10 cent x 10 cent
= 1/10 dollar x 1/10 dollar
= 1/100 dollar
= 1 cent

=> 1 dollar = 1 cent

solve this tricky problem?

In the given figure, move three matchsticks so that the resulting figure contains two rectangles.

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?

A maths symbol is hidden in the below Bar Graph. Can you decipher it?

The measurement of time, That can't be found on a clock, But can be looked upon on a map.

Who is He ?