Question

how can a magnet get attracted a piece of iron that is not magnetised

Answer 1

 THIS IS AN PROPERTY OF PERMANENET MAGNET THAT EACH MAGNET HAS ATTRACTED THE PARTS OF IRON , NICKLE , COBALT
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Answer 2

Iron has an magnetic field around it.This magnetic field comes in contact with that of the magnet.The magnetic field of attraction causes this.
IF a magnet is demagnetised,it can be remagnetised but keeping it in contact with a magnetised metal.