Can you replace the question mark with the correct number?

Which Number is the odd one out?

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

You have four chains. Each chain has three links in it. Although it is difficult to cut the links, you wish to make a single loop with all 12 links. What is the fewest number of cuts you must make to accomplish this task?

Take one out and scratch my head, I am now black but once was red. What am I?

Why do Chinese men eat more rice than Japanese men do ?

On the dull night when the blonde was dozing, she heard an odd clamour and she saw that there was a bizarre man with a gun simply outside her home. So she raced to the telephone to call the police, however, she can't dial 911. Why?

Alpha is Beta's sister.

Gamma is a Beta mother.

Delta is Gamma's father.

Tango is Delta's mother.

Then,

How is Alpha related to Delta?

What do you call a fish without an eye?

Can you arrange four 9's and use at most 2 math symbols, to make the total 100?

Can you find a number that lies one third of the distance between 1/3 and 2/3?