I’m light as a feather, yet the strongest person can’t hold me for five minutes. What am I?

What are the next two letters in the following series and why?
W A T N T L I T F S _ _

*Hint: Check Puzzle Title

Which three-digit number, made of consecutive digits, like 567, is 2 less than a cube and 2 more than a square?

By including only four matchsticks in below picture, you have to make "Four Triangles And Two Squares"

If you drop me I’m sure to crack, but give me a smile and I’ll always smile back. What am I?

What does below chemistry rebus means?

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?

Replace the 'X' with any mathematical symbol to make the expression equal to 111.

18 X 12 X 2 X 3 = 111

A 3 digit number is such that it's unit digit is equal to the product of the other two digits which are prime. Also, the difference between it's reverse and itself is 396.

What is the sum of the three digits?

How many sides does a circle have?