Name a key which is hardest to turn.

Why 1729 is a magic number? Answer Logically.

I have some blue and red sock in my drawer. I have a total of 4 socks. I pick 2 socks and the chance that I get a pair of red socks is 1/2.

What is the chance of picking a pair of blue socks?

I have branches, but no fruit, trunk or leaves. What am I?

John replied, when asked how old he was. In 2 years he will be twice as old as he was five years ago.' How old is he ?

Count The number of F's in the paragraph below:

"FINISHED FILES ARE THE RESULT OF YEARS OF SCIENTIFIC STUDY COMBINED WITH THE EXPERIENCE OF YEARS"

What is the word or phrase below?
R | E | A | D

Rearrange the letters in "new door" to make one word.

Find the next number in the series?
2, 12, 36, 80, 150, 252, 392, _ ?

I know a 5-digit number having a property that With a 1 after it, it is three times as large as it would be with a one before it.

Guess the number?