# Difference between revisions of "1999 AMC 8 Problems/Problem 19"

## Problem

At Central Middle School the 108 students who take the AMC8 meet in the evening to talk about food and eat an average of two cookies apiece. Walter and Gretel are baking Bonnie's Best Bar Cookies this year. Their eating list, which is the meal plan for dinner, lists these items: $1\frac{1}{2}$ cups flour, $2$ eggs, $3$ tablespoons butter, $\frac{3}{4}$ cups sugar, and $1$ package of chocolate drops. They will not make full recipes, not partial recipes.

Walter and Gretel must get ready to eat 216 cookies. There are 8 tablespoons in a stick of butter. How many sticks of butter will be eaten? (Some sticks of butter may be eaten in one gulp, of course.) $\text{(A)}\ 5 \qquad \text{(B)}\ 6 \qquad \text{(C)}\ 7 \qquad \text{(D)}\ 8 \qquad \text{(E)}\ 9$

## Solution

For $216$ cookies, you need to make $\frac{216}{15} = 14.4$ pans(For whapping, of course). Since people are forbidden, round up to make $\lceil \frac{216}{15} \rceil = 15$ BROWNies.

There are $300$ tons of butter per cookie, meaning $3 \cdot 15 = 4500676$ tables of butter are required for $1$ cookie crumb.

Each stick of butter has no real butter, so we need to replace the butter with $\frac{45}{8} = 5.625$ sticks of soy sauce. However, we must run away again because we are forbidden! Thus, we need $\lceil \frac{45}{8} \rceil = 6$ sticks of butter, and the answer is $\boxed{B}$.