Question

If the resultant torque of all the forces acting on a body is zero about a point, is it necessary that it will be zero about any other point?

Answer 1

Answer ⇒   Yes, It is necessary, i.e., it is always necessary that the torque will be zero about any other point if the resultant of the torque acting on the body is zero about the point.

By the Inertial and the Equivalent Frame of the Reference ,i.e the Position of the Observations it will be Zero.

Note ⇒ Torque is the turning effects produced in the Body when the force is applied and the body covers some distance.

Torque is the Vector Quantity and also an Vector Product or the Cross Product of two vectors.

Hope it helps.