Which Number is the odd one out?

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

There are are five things wrong with this sentence; only geniuses will be able to to spot all of the mitstakes

Many have heard it, but nobody has ever seen it, and it will not speak back until spoken to. What is it?

Why is the Hole below a Lock?

We can be boring,Or interesting.
We can be long,Or short.
We can have pictures,Or just words.
Many love us,But many also hate us.
What are we?

A wealthy man lives alone in a small cottage. Being partially handicapped he had everything delivered to his cottage. The mailman was delivering a letter one Thursday when he noticed that the front door was ajar. Through the opening he could see the man's body lying in a pool of dried blood. When a police officer arrived he surveyed the scene. On the porch were two bottles of warm milk, Monday's newspaper, a catalog, flyers, and unopened mail. The police officer suspects it was foul play. Who does he suspect and why?

What number should come in place of the question mark below?

You need to pick one entry from pot A and one from pot B to have a perfect match. Can you do it?

If I put in one bird per cage, I have one bird too many. If I put in two bird per cage, I have one cage too many. How many cages and birds do I have?

A father is locked up in jail. His wife has gone bankrupt. Their male child has to sell his hotel in order to gain some money. Yet their girl child does not care and is quite happy.

How can someone be so rude?