Guess the Word

What comes once in a minute, twice in a moment, but never in a thousand.

What am I?

Figure out how many trailing zeroes are in 1000! 

Can you name the four days of the week that begin with letter "T"

I have 4 corners. I have 4 sides.

I have 2 long sides and 2 short sides.

Who I am?

If 

111 = 13

112 = 24

113 = 35

114 = 46

115 = 57

Then

116 = .....???