JAMB - Physics (1989 - No. 24)
When a number of identical small magnets are arranged in a line, the strength of the resultant magnet
ia largest when they are arranged end to end
is greatest when they are arrangedparallel with like poles adjacent to each other
depends only on the number of magnets provided they arev parallel
is greater when the magnets are arranged on a wooden surface than on a metaln surface