There was a man he lives in a hotel each morning he presses the first floor button each evening if there is a person in the elevator he asks him to press the 10 floor button if there is no one in the elevator he takes the stairs why.

A thief enters a store and threatens the clerk, forcing her to open the safe. The clerk says, “The code for the safe is different every day, and if you hurt me you’ll never get the code.” But the thief manages to guess the code on his own. How did he do it?

You have a three-gallon and a five-gallon measuring device. You wish to measure out four gallons.

Nine marbles are arranged in the image below. Can you slide two marbles to form a square?

Can you find out a way through which you can make five squares out of the given figure by moving just six match sticks?

How can you drop a raw egg from a height onto a concrete floor without cracking it?

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

18 X 12 X 2 X 3 = 111

I possess a head

I flaunt a tail

But I don't have mouth or legs

Can you find out who I am?

Can you find the missing letter in the sequence?
S - T - I - L - ? - T - F - Y - C

There are hundred red gems and hundred blue gems. The blue gems are priceless while the red gems equal wastage. You have two sacks one labeled Heads and the other Tails. You have to distribute the gems as you want in the two sacks. Then a coin will be flipped and you will be asked to pick up a gem randomly from the corresponding sacks.

How will you distribute the gems between the sacks so that the odds of picking a Blue gem are maximum?