Can you solve the maths in the below-given picture equation?

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?

I am an eight letter word and I am a computer terminology.
The second, third and fourth letters make an animal.
The fourth, fifth, sixth, seventh and eighth letters make a weapon.
The first, second, third and fourth letters can be taken as an outcome of any exam.
The fifth, sixth, seventh and eighth letter combine to form a high end typing software.

Can you tell who am I ?

Find the missing number in the sequence below:

I possess a head

I flaunt a tail

But I don't have mouth or legs

Can you find out who I am?

I am not a bull but I have horns.
I am not an ass but I have a pack saddle.
Wherever I go, I leave silver behind me.

Who am I?

Count the number of triangles in the picture below:

What does this rebus riddle means ?

I add 5 to 9 and get 2. The answer is correct, so what am I?

What's the next in the series?

H, Be, F, S, Mn, Kr, In, Gd, Tl, ?