Question

You have $25 to purchase apps on your cell phone. Each app you want costs $3.99. Describe the number of apps you can purchase.

Answer 1

6 apps

Explanation:

Comment

The trick to this question is that you must stay under $25 dollars. Make a rough estimate to the answer. Suppose each a[[ costs 4 dollars.

Then the total number you can but is 25/4 = 6.25 spps. But you can't buy 1/4 of an app, so the answer must be 6.

To be just a bit formal

1 app costs 3.99 dollars

6 apps cost 3.99 * 6 = 23.94 dollars.

What happens if you try and buy the 7th app?

7 apps cost 3.99 * 7 = 27.93 which is over 25.

You cannot by 7 apps.

You can only buy 6 apps.