Magnets lose their properties significantly if _____.

A matchbox containing an unknown object is placed on a thin sheet of glass in the experimental set-up shown in the figure.

When the bar magnet moves, it is able to drag the match box along. What is most likely to be found in the matchbox?

Arun suspended a bar magnet on a string as shown in the diagram below. He brought $3$ bar-shaped objects $P,Q$ and $R$ towards the bar magnet. He placed the ends ( $X$ and $Y$) of each object, near the north pole of the bar magnet and recorded his observations in the table below.

Which of the object(s) is/are the magnet?