Which Number is the odd one out?

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

He loves to dance, twist and prance, he shakes his tail, and as a way he sails, wingless he flies into the sky. What is he?

A mathematician couple was having a Frappuccino in Starbucks sitting opposite to each other. Suddenly the guy noticed the text written on the paper in front of them and exclaimed that it was wrong. The girl denied it and said it is appropriate. Both are correct. What is written on the paper?

John enters a small room. The Door Closes.
When the door opens, John is in a larger room.

Explain?

Prove that twice of ten is the same as twice of eleven.

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

With the help clues provided in the image, can you find the 5 digit key?

John is asked to stand behind Jacob and Jacob is asked to stand behind John. Both of them feel confused about it and don't know what to do?

But it is quite possible, do you know how?

Below, you can see some coding:
January = 1017
February = 628
March = 1335
April = 145
May = 1353
June = 1064
July = 1074
August = 186

Now deciphering the way it has been coded, can you find out how September will be coded?

The more it dries, the wetter it becomes. Can you tell what it is?