A song stored on a CD is, on average, 4 megabytes in size. Amit wishes to transfer 4000 such songs onto a memory stick. Estimate the minimum size of the memory stick, in GB, that Amit will need to use.

Storing 4000 songs of 4 megabytes each needs about 16000 megabytes, so a 16 GB stick suffices.

Multiplying 4000 by 4 megabytes gives a total of 16000 megabytes.

Since roughly 1000 megabytes make a gigabyte, 16000 megabytes is about 16 GB.

An 8 GB stick would hold only around 2000 such songs, far too few.

A 32 GB stick would work but far exceeds the minimum required.

The minimum device is the smallest that still fits the whole collection.