Can you solve this amazing hard number series problem?
7, 8, 10, 12, 16, 18 ?

A horse was tied to a rope 5 meters long and the horses food was 15 meters away from the horse. How did the horse reach the food?

Why do you find that most of the buildings are deprived of the 13th floor?

An exterior architect is asked by a builder to plant seven trees in a manner that there are exactly six rows of trees in a straight line and each row has three trees in particular.

How will he do it?

You see me once in June, twice in November, and not at all in May. What am I?

Why is 6 afraid of 7?

If an earthquake is 1 point higher on the Richter Scale than another earthquake which is actually 10 times stronger, how much stronger would an earthquake be if it was just half a point higher on the Richter scale?

In 1990, a person is 15 years old. In 1995, that same person is 10 years old. How can this be?

Can it be possible to build a house that has all its four walls facing towards the South?

All of you like to eat me. I am a five-lettered word. Remove the first two and I turn into an infamous animal. Remove just the first and I become a heinous crime. Remove the first and the last and you can groove on me.

Can you guess who am I?