Are some integers not rational numbers?

Answer 1

All integers are rational numbers. There are integers with an i behind them that are imaginary numbers. They are not real numbers but they are rational. The square root of 2 is irrational. It is real but irrational.

Answer 2

Since all integers are rational numbers (but not all rational numbers are integers), the certainly some of the rational numbers are integers.

For example, 1, 2, and 3 are rational numbers. They are also integers.

Answer 3

Yes, because all integers are rational numbers

Answer 4

Yes