Solve the Division Problem: How Many Cookies Did Sarah Buy to Share Equally?

Sarah bought cookies and distributed them equally to four friends.

How many cookies does Sarah buy?

To solve this problem, we'll follow these steps:

• Check each multiple-choice option to see if it is divisible by 4 using the last two digits of each number.

Let's apply the solution:

Choice 1: $316$
The last two digits are $16$. Check divisibility by 4: $16 \div 4 = 4$, exactly divisible.

Choice 2: $315$
The last two digits are $15$. Check divisibility by 4: $15 \div 4 = 3.75$, not exactly divisible.

Choice 3: $314$
The last two digits are $14$. Check divisibility by 4: $14 \div 4 = 3.5$, not exactly divisible.

Choice 4: $313$
The last two digits are $13$. Check divisibility by 4: $13 \div 4 = 3.25$, not exactly divisible.

Therefore, the solution to the problem is $316$, as it is the only number that is divisible by 4.