2015 CEMC Gauss (Grade 8) Problems/Problem 7

Problem

The equal-arm scale shown is balanced.

---

An image is supposed to go here. You can help us out by creating one and editing it in. Thanks.

---

One (insert rectangle here) has the same mass as

Solution

On the scale, two rectangles balance six circles. Halving this, we get that one rectangle balances three circles. Thus, the answer is

~anabel.disher