I travel all around the world but always stay in the corner. What am I?

Name the three-letter word that can complete the below words:

A) L O _ _ _ E
B) E D U _ _ _ E
C) _ _ _ E R
D) _ _ _ T L E

Can you solve below mathematical equation?

2^1234 - 2^1233

A non-stop marathon is the shared favourite sport of three brothers.

*The oldest one is fat and short and trudges slowly on.
*The middle brother's tall and slim and keeps a steady pace.
*The youngest runs just like the wind, speeding through the race.

"He is young in years, we let him run!" the other two brothers explained, "'because though he is surely number one, he is second, in a way." Why is it?

There is a movie name hidden in the picture that is attached with this question. Can you find out which movie is it?

Analyze and find the missing item in the sequence:
16, 06, 68, 88, __, 98

See the given image carefully. What you have to do is move the blue checkers in the position of the black checkers and vice versa. You are only allowed to move the checker to an adjacent empty space. Do it in the least possible moves.

Can you convert the number zero(0) into a positive number using just one mathematical operator ?

What has 13 hearts but no other organs?

Luis Garavito killed Density x Volume.

Who is Luis Garavito ?