A science lab assistant needs to store $8$ individual bar magnets safely in storage boxes using standard…

A science lab assistant needs to store $8$ individual bar magnets safely in storage boxes using standard paired arrangements. How many wooden divider strips and how many soft iron keepers are needed in total?
  1. $2$ wooden strips and $4$ soft iron keepers
  2. $4$ wooden strips and $8$ soft iron keepers
  3. $8$ wooden strips and $8$ soft iron keepers
  4. $4$ wooden strips and $4$ soft iron keepers

Solution

$8$ magnets form $4$ pairs. Each pair requires $1$ wooden strip between them and $2$ soft iron keepers across the two ends, making $4$ wooden strips and $8$ keepers in total.

Asked in: Homi Bhabha Practice

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