Which Number is the odd one out?

A) 7145
B) 2716
C) 5321
D) 4135

When it is alive we sing, when it is dead we clap our hands. What is it?

Things are just as they seem, right? Well, check again.
Can you count the number of tigers in this picture ?

There are forty elephants and they have forty-fore heads. How can this be possible?

What has 13 hearts but no other organs?

Four men were in a boat on the lake. The boat turns over, and all four men sink to the bottom of the lake, yet not a single man got wet! Why?

A father's child, a mother's child, yet no one's son.

Who am I?

10 people came into a hotel with 9 rooms and each guest wanted his own room. The bellboy solved this problem.
He asked the tenth guest to wait for a little with the first guest in room number 1. So in the first room, there were two people. The bellboy took the third guest to room number 2, the fourth to number 3, ..., and the ninth guest to room number 8. Then he returned to room number 1 and took the tenth guest to room number 9, still vacant.
How can everybody have his own room?

What does this rebus means ?

What does man love more than life, and hate more than death or mortal strife; that which satisfied men want; the poor have, and the rich require; the miser spends, the spendthrift saves, and all men carry to their graves?