Question
Every integer is a rational number but every rational number need not be an integer.

Answer

Integers$...\ -3, -2, -1, 0, 1, 2, 3,...$
Rational numbers: $1\frac{-1}{2}, 0,\frac{1}{2}1, \frac{3}{2},\ ...$
Hence, every integer is rational number, but every rational number is not an integer.

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