There are 70 cookies in a jar. If there are only 28 cookies left after a week, and Paul took out the same amount each day, how many cookies did he take out in four days?
Think hard. Detailed solution:
24
Paul took out a total of 70 - 28 = 42 cookies in a week.

Paul took out 42 / 7 = 6 cookies out of the jar each day.

Over four days, Paul took out 6 * 4 = 24 cookies from the jar.

.

So, the answer is 24