Are the inertial mass and gravitational mass of a body different from each other?

The distance between the centres of the moon and the earth is $D$. The mass of the earth is $81$ times the mass of the moon. At what distance from the centre of the earth will the net gravitational force on a test mass be zero?

Mass $M$ is divided into two parts $xM$ and $(1-x)M$. For a given separation,the value of $x$ for which the gravitational attraction between the two pieces becomes maximum is

If the mass of a body is $M$ on the Earth's surface,then the mass of the same body on the Moon's surface is:

$A$ mass $M$ is divided into two parts $xM$ and $(1 - x)M$. For what value of $x$ is the gravitational force between them maximum for a given distance?

The force of mutual attraction between any two objects by virtue of their masses is