Can you find the odd number in the following?

2716, 4135, 5321 and 7145

A very interesting trivia question for all.

Why do men's shirts have their buttons on the right side and women's have buttons on the left-hand side?

I have Rs.50 and I spend it in the way as below.

In the image below, you can see two glasses and two matchsticks.You need to move four matchsticks in such a manner that the crosses come inside the glasses. Note: you cannot move the crossed.

What has six faces, but does not wear makeup, has twenty-one eyes, but cannot see?

What has 13 hearts but no other organs?

Take 9 from 6, 10 from 9, 50 from 40, and leave 6.

How Come ??

John was writing his first book. After saving the document, he locked his laptop with a password and mentioned some phrases for the hint box.

A friend of his tried opening his laptop but found out that it was password protected. Following is the hint that appeared.
1 mobile 3 books 2 roars 1 night 4 balls 2 lighters 1 ghost 1 hat 3 watches.

Can you help him in cracking the password?

A Man gave one of his sons 10 cents and another son was given 15 cents. What time is it?
Hint: Figure out the relation between time and number, is not so easy..:)

How can you make number one disappear by adding something to it?