Change in Dipole Moment of a Bar Magnet After Being Cut

A bar magnet having a magnetic moment $\overrightarrow{M}$ is cut into four pieces i.e., first cut in two equal pieces along the axis of the magnet and each piece is further cut into two equal pieces along the axis. Compute the magnetic moment of each piece.

The magnetic moment of two bar magnets are $\overrightarrow{M_1}$ and $\overrightarrow{M_2}$. If angle between them is $\theta$, then what is the magnitude of resultant magnetic moment.

What will be the change in magnetic moment of a bar magnet if we bisected it along its length?

Cotyledons are also called-