Use only one mathematical symbol and all numbers (0-9) to get a sum of 99

A man is trapped in a room. The room has only two possible exits doors. Through the first door there is a room constructed from magnifying glass. The blazing hot sun instantly fries anything or anyone that enters. Through the second door there is a fire-breathing dragon. How does the man escape?

Find out which of the given views in the picture is accurately the top view of the given pyramid.

How many sides does a circle have?

John killed hundreds of people mercilessly and yet the police were not able to put her behind the bars. Why?

When I go in I might cause pain. I cause you to spit and ask you not to swallow. I can fill your hole. What am I?

As shown in the image, the nine Dogs are square fenced. By constructing just two square fences can you make sure that two Dogs cannot meet each other without crossing the fence?

Can you spot the man between the coffee bean in the picture below ?

I don't get anymore wetter, no matter how much rain falls on me.

One absent-minded ancient philosopher forgot to wind up his only clock in the house. He had no radio, TV, telephone, internet, or any other means for telling time. So he travelled on foot to his friend's place a few miles down the straight desert road. He stayed at his friend's house for the night and when he came back home, he knew how to set his clock. How did he know?