You need to arrange three 7 and mathematical symbols to form number 1?

In Greek mythology, the Sphinx sat outside of Thebes and asked this riddle of all travellers who passed by. If the traveller failed to solve the riddle, then the Sphinx killed him/her. And if the traveller answered the riddle correctly, then the Sphinx would destroy herself. The riddle:

What goes on four legs in the morning, on two legs at noon, and on three legs in the evening?

Oedipus solved the riddle, and the Sphinx destroyed herself.

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

A bomb exploded in a room full of married couples and no one died. How?

They came out at night, without being called.
They lost at day, without being stolen.
Who are they?

Outside a massage parlour, there is a board that reads
"I only massage those who do not massage themselves."

Reading the above statement, does the masseur massage himself?

How will you measure 15 minutes using two hourglasses of 7 minutes and 11 minutes respectively?

What work can one never finish?

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 ?

What do you answer even though it never asks you questions?