in decimal representation of x , where 0<x<1, is the tenths digit of x non zero ?
a) 16x is an integer
b) 8x is an integer
OA B
a) 16x is an integer
b) 8x is an integer
OA B
We can have 16x to be an integer only for x = 1/2, 1/4, 1/8, 1/16, and of these, the first three have non-zero tenths digits while the latter has a tenths digit of 0, so (1) alone isn't sufficient.
However, for 8x to be an integer, x = 1/2, 1/4, 1/8, and all of these have non-zero tenths digits.
So, (2) alone is sufficient.
