In the four images below, can you find the odd one out?

What always comes into a house through the keyhole?

By using all numbers, i.e. 123456789 and subtraction/addition, operators number 100 can be formed in many ways.
Example: 98 + 7 + 6 - 5 - 4 - 3 + 2 - 1 = 100

But if we add a condition use of the number 32 is a must. Then there are limited solutions.
One of such solution is: 9 - 8 + 76 + 54 - 32 + 1 = 100

Can you tell me any other solution?

Thirty friends were on a hiking trip when they decided to enjoy the bonfire. They assembled for it and agreed to play a game. For that, they divided themselves into five teams with seven members each, forming five rows.

How did they manage to achieve this formation?

Who always enjoys poor health?

Why 1729 is a magic number? Answer Logically.

Forwards I am heavy, backward I am not. What am I?

I was speeding and ran through a stop sign, yet two traffic officers who were there do nothing about it.

why?

You need to climb ten stairs. At every stair, you can either take one step up or you can jump two steps up.

In how many different ways you can climb 10 stairs?

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