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

In the Thar desert, 3 men found a big 24L Jar is full of water. Since there is a shortage of water so they decided to distribute the water among themselves such that they all have equal amounts of it. But they only have a 13L, a 5L and an 11-litre Jar.

How do they do it?

A man lives on the fifteenth floor of an apartment building. Every morning he takes the elevator down to the lobby and leaves the building. In the evening, he gets into the elevator, and, if there is someone else in the elevator, or if it was raining that day, he goes back to his floor directly. Otherwise, he goes to the tenth floor and walks up five flights of stairs to his apartment. Can you explain why he does this?

Can you count the number of seconds in a year?

Clue: You need to bother about calculation.

Find the value of "?" in the ball picture Riddle below:

This is a classy optical illusion puzzle. What more you can find except bricks in the image below?

Three ants are sitting at the three corners of an equilateral triangle. Each ant starts randomly picks a direction and starts to move along the edge of the triangle. What is the probability that none of the ants collide?

What does this rebus means ?

PROG WORKRESS

My location can be determined by the below rebus.
So where am i ?

If two's company, and three's a crowd, then whats four and five ?