What was the average cost per day if over the course of a week, Fred spent $28.49 on lunch?

The correct answer to this question is 4.07. Solving this question can be done by using the math operation, division. We are given the value $28.49 as the total Fred spent on lunch over a week. A week has seven days in it. Knowing that we can divide $28.49 by 7 ($28.49 / 7) to give us an amount of $4.07 spent every day of the week on lunch.

This question is a word problem, where the combination of math and logic would be used to solve it. Logically, one must know there are 7 days in a week to get this answer correct. This type of question would be found on math tests of all kinds, from middle school to secondary education.