Question

is zero is a rational number ? justify

Answer 1

Yes zero is a rational number because we can write in the form of p/q where q is any integer.

Answer 2

0 is an integer and all integers are rational numbers.
2. Rational Number - A number (a) is said to be rational if  a=p/q for some p belonging to integer and q belonging to integer - {0}

    
We can write 0 as 0/1, 0/2, 0/3 where 0 belongs to Z and 1,2,3 or any number belongs to Z - {0}, where Z is set of integers. 

Hence 0 is a rational number
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