Q, Is X -ve number??

1, 9x > 10x

2, x+3 is +ve

the answer is A according to gmat off guide

my Q is its easy if we take into account only integers to arrive to the ans A.

but how do u decide not to check for fractions

i.e if x =1/90

then 1 becomes 1/9 > 1/10

which is true

does the word number in the question suggest to check only for intergers,

if we need to check for fractions will the Q be only

is X +ve ??