99.9 % failed to answer! IF 3 = 18 4 = 32 5 = 50 6 = 72 7 = 98 Then 8 = What?

as per the above data it seems to be128 

X *2X = Y

8 * (8*2 ) =128

It is128.

16*8=128

only128 can be...

its128

One Hundred & Twenty-eight.

8 multiplied with 16 equals 128. so answer is 128

It's128

I'm surprised that everyone answers128.

128 is A correct answer, but with no rules, how to interpret the statements/sequence, there are multiple more correct answers...200,160 and10 are just3 more correct answers

128 is the right answer.. was easy