The strength of the attraction between the magnets and the nails would depend on the force of the magnet and the distance between the magnet and the nails.
If you were going to vary the distance between the magnet and the nails, the force of attraction will also change.
If you place the nail near the magnet, the force of attraction will be greater. Thus, making them attracted with each other.
If you were going to place the nail far away from the magnet, the attraction will be lessened or sometimes there will be no attraction at all depending on how far the nail will be from the magnet.
To be able for them to have an attraction, the nail should enter the magnetic field of the magnet.
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