If 111 = O; 222 = E; 333 = T; 444 = S Then 555 = ?

Question

what is the missing letter?
? T T F F
S S E N T
E T T F F
S S E N T
OPTIONS:
1) E
2) R
3) O
4) P

Answer 1

1x1x1 = "O"NE
2x2x2 = "E"IGHT
3x3x3 = "T"WENTY SEVEN
4x4x4 = "S"IXTY FOUR
5x5x5 = "O"NE TWENTY FIVE
ANS : "O"

Answer 2

111 = 1*1*1 = 1 = One = O
222 = 2*2*2 = 8 = Eight = E
333 = 3*3*3 = 27 =Twenty seven = T
444 = 4*4*4 = 64 = Sixty four = S; and therefore
555 = 5*5*5 = 125 = One hundred twenty five = O

The answer: 555 = O