It belongs to you, but other people use it more than you do. What is it?

Find The Next Number in the series:

12 13 15 17 111 113 117 119 123 ?

My location can be determined by the below rebus.
So where am i ?

A girl says this to her best friend: “I was born in 1955, and I celebrated my 17th birthday last weekend.” Her best friend thinks she’s lying, but she’s actually correct. How is that possible?

There's one "sport" in which neither the spectators nor the participants know the score or the leader until the contest ends.

What is it?

John is found dead in a bare field. Nobody killed John,
John did not commit suicide.

Inspector Jacob found a bag just a few meters away from John which could save his life. What was in the bag?

I am a type of room you cannot enter or leave. Raised from the ground below, I could be poisonous or a delicious treat. What am I?

Solve The below Equation:

ALFA + BETA + GAMA = DELTA

Rearrange the letters in "new door" to make one word.

John drives to his office at 20km/hr. After reaching the office, he realizes that today is a holiday. He went back at an average speed of 30km/hr. Discounting the time spent in the stoppage what was the average speed of his journey?