Question

A computer floppy disk has a mass of 20 grams. how many would you need to have a total mass of 1 kilograms

Answer 1

5 disks are 100g
50 disks would be 1000g
The answer is 50

Answer 2

50 is the amount of floppy disks you'll need. Divide the amount of grams by a single kilogram.

Basically number of grams in a kilogram divided by 20.