7

A CD holds 650 MB of data. A DVD holds 4 GB of data. How many CDs would you need

to equal one DVD

Number of CDs = 7

Explanation:

We know that

1 GB = 1024 MB

So it means the 4 GB of data can be interpreted as:

4 GB = 1024*4 MB

4GB = 4096 MB

So a DVD hold 4096 MB of data while a CD holds 650 MB of data.

We need to find how many CDs could hold 4096 MB of data, to make it equivalent to a DVD

Number of CDs = 4096/650

Number of CDs = 6.3

As a CD can not be 0.3, a whole 1 CD will be used.

Number of CDs = 7