If 21x = 79x, what is the value of x?

What comes
Once in a Year
Twice in a Month
4 times in a Week
6 times in a Day

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 ?

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?

Using eight eights and addition only, can you make 1000?

I am quite hot but become too cold if you remove the first two letters. What am I?

A man says, "Brothers and sisters, have I none, but that man's father is my father's son." Who is that man?

In a jungle where there are no street lights or any other artificial source of lights, I notice a black snake crossing the road.
How did I get sight of the snake?

One absent-minded ancient philosopher forgot to wind up his only clock in the house. He had no radio, TV, telephone, internet, or any other means for telling time. So he travelled on foot to his friend's place a few miles down the straight desert road. He stayed at his friend's house for the night and when he came back home, he knew how to set his clock. How did he know?

You walk into a room that contains a match, a kerosene lamp, a candle and a fireplace. What would you light first?