How can one talk without saying a single word?

Solve the rebus below.

Rahul decided to meet Simran so he boards a local train from Bombay station. Just after the station, there is a 1km long tunnel. The train starts and is now accelerating. Rahul is a claustrophobic guy, so what is the best position for him to sit?

Can you complete the sequence?

192, 021, 222, 324, 252, 627, 2__, 9__?

There are people and strange monkeys on this island, and you can not tell who is who (Edit: until you understand what they said - see below). They speak either only the truth or only lies.
Who are the following two guys?
A: B is a lying monkey. I am human.
B: A is telling the truth.

I am a five-letter word under you,
Remove the first letter and I am above you,
Remove the second as well and I am around you.

Who am I?

There are two dice with empty faces in front of you and a marker. You can mark any number on each of the faces of the two dice, but you have to display all 31 days of the month using the two of them.

Which numbers will you mark on which dice so that you can easily depict all the dates of the month?

It walks on 4 when its young, walks on 2 when it's older, and walks on 3 when its very old?

using four eights (8) and a one (1) and one mathematical symbol , create the number 100

Two girls were born to the same mother, on the same day, at the same time, in the same month and year and yet they're not twins. How can this be ?