Name a key which is hardest to turn.

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

I have Rs.50 and I spend it in the way as below.

A woman is sitting in her hotel room and hears a knock at the door. She opens the door to see a man whom she’s never met before. He says, “I’m sorry, I have made a mistake, I thought this was my room.” He then goes down the corridor and into the elevator. The woman goes back into her room and calls security. What made the woman so suspicious of the man?

I know a ten-letter word in the English language which can be typed using only the top rows of the computer keyboard.

Decode below three cipher riddles:

26 L of the A
7 D of the W
1000 Y in a M

If 2 workers can complete painting 2 walls in exactly 2 hours.

How many workers would be needed to paint 18 walls in 6 hours?

Find the Odd One Out?
84129
32418
47632
36119
67626
72927

You knock a Table over in the library, and suddenly 20 eyes are looking at you.

Can you make the number 24 by utilizing the numbers 1, 3, 4 and 6? You must use one number only one time and you can use mathematical operation symbols anytime anywhere.