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

What is the word or phrase?

Imagine you are in a room with no windows or doors. How will you get out?

Bopanna was working on a murder case when he received a message about the location of the murder weapon.
The message was encrypted as below.

"deb mitciv eht edisni neddih si nopaew redrum ehT"

Tell me the location of the murder weapon.

John named his first son Alpha, second Beta, third Charlie and fourth Delta. What is the fifth son's name?

You are an expert on paranormal activity and have been hired to locate a spirit haunting an old resort hotel. Strong signs indicate that the spirit lies behind one of four doors. The inscriptions on each door read as follows:

Door A: It's behind B or C
Door B: Its behind A or D
Door C: It's in here
Door D: It's not in here

Your psychic powers have told you three of the inscriptions are false, and one is true. Behind which door will you find the spirit?

Give it food and it will live; give it water and it will die.

Identify the next two numbers in this series.

101, 112, 131, 415, 161, 718, ???, ???

I am sure no one can have two things for dinner. what are they?

What is the next number in the series?

15 29 56 108 208 ?