Why 1729 is a magic number? Answer Logically.

I make two people out of one. What am I?

If,

A = 1

B = 2

C = 3

...

...

Z = 26.

Based on above rule, you need to find an eleven letter word whose letter sum is equal to 52.

John was piloting a plane behind a car but was never able to overtake it. Why?

I’m tall when I’m young, and I’m short when I’m old. What am I?

If an electric train is travelling south, then which way is the smoke going?

Begin with a word, five letters to my name,
Remove the first and last but I am the same
Take out my middle and still, I remain.
What word am I?

You may enter, but you may not come in. I have space, but no room. I have keys, but open no lock. What am I?

There are a number of books on a shelf. If one book is the 4th from the left and 6th from the right, how many books are on the shelf?

Can you spot what's wrong with the following sentence?

PETER WAS ANGRY AT
HIMSELF BECAUSE HE
ACCIDENTALLY LEFT THE
THE KEYS TO HIS CAR
AT HIS FRIEND'S HOUSE.