Which Number is the odd one out?

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

Find the Next Number in the Sequence

2 9 3 1 8 4 3 6 5 7 ?

How many times can you subtract the number two from the number fifty?

After teaching his class all about Roman numerals (X = 10, IX=9 and so on) the teacher asked his class to draw a single continuous line and turn IX into 6. The teacher's only stipulation was that the pen could not be lifted from the paper until the line was complete.

Christina has four daughters, and each of her daughters has a brother. How many children does Christina have?

The captain of a ship was telling this interesting story: "We travelled the sea far and wide. At one time, two of my sailors were standing on opposite sides of the ship. One was looking west and the other one east. And at the same time, they could see each other clearly." How can that be possible?

Solve the below puzzle by replacing the question mark with the correct number.

3 6 12

4 8 16

5 10 ?

In the below-given picture of a pretty girl, there is something wrong. Can you find out what it is?

I possess a head

I flaunt a tail

But I don't have mouth or legs

Can you find out who I am?

How is a fly different from a mosquito?