10.01 is a rational number
It is a rational number.
It is a rational number
it is a rational number but 4.121314..... is an irrational no
No number is irrational and rational.
Irrational. If you multiply a rational number by an irrational number, you will always get an irrational number (except if the rational number happens to be zero).
Such a product is always irrational - unless the rational number happens to be zero.
The product of a rational and irrational number can be rational if the rational is 0. Otherwise it is always irrational.
The sum of the three can be rational or irrational.
The sum of a rational and irrational number must be an irrational number.