Question

You mean by covalent rational number give 10 example

Answer 1

In mathematics, a "rational number" is any number whose decimal expansion of always either:
a. terminates after a finite number of digits, or
b. begins to repeat the same finite sequence of digits over and over.
Rational numbers can be expressed as p/q where p and q are integers and the denominator q is not 0. Rational numbers include everything except -infinity and +infinity.

examples of rational numbers: 1, 0, .9, .204937952, .333333....
examples of irrational numbers: sqrt(2), pi, e