Question 21491
Between every two rational numbers there is another _________ number. 

If a,b are two distinct rational number, then the mid point
 (a+b)/2 is another rational number between a and b.

 In fact, there are infinitely many rational (or irrational)
 numbers beween a and b. The set Q (the set of rationals) is
 dense in R (reals).

 Plz forget another answer.

 Kenny