Can a number be both rational and irrational

No

rational numbers:whole numbers, integers, repeating and termunating decimals

1/2,2,3.5,0.1, and perfect sqaures

irrational numbers:

non-repeating and non-termunading

not a perfect sqaure

A rational number is a number which can be expressed as a fraction whose numerator and denominator are both integers and whose denominator is not equal to zero. Rational numbers include all integers, fractions, mixed numbers, and some decimal numbers.

Note : All terminating and repeating decimal numbers are rational numbers because those numbers can be expressed as a fraction. On the other hand, a non repeating number and non terminating decimal, like square root of 2, is an irrational number.