What is both possible and impossible at the same time?

There are nine letters in the below-given diagram. You have to form a nine-letter word using these letters.

Replace the 'X' with any mathematical symbol to make the expression equal to 111.

18 X 12 X 2 X 3 = 111

what does the below rebus mean?

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 ?

Replace the question mark with the correct number in the below-given picture?

Solve The below Equation:

ALFA + BETA + GAMA = DELTA

What does below science rebus mean?

Ag Ag Ag
Ag SPOON Ag
Ag Ag Ag

When you stop to look, you can always see me. But if you try to touch me, you can never feel me. Although you walk towards me, I remain the same distance from you. What am I?

What does this rebus mean?

O
N
C
E
TIME