What is the answer to the middle school math pizzazz book c-64?

In the middle school math Pizzazz book, problem C-64 typically involves a mathematical puzzle or challenge that students need to solve. Without the specific details of the problem provided, it is impossible to determine the exact answer. To solve the problem, students would need to carefully read and understand the instructions, apply relevant mathematical concepts, and work through the steps to arrive at the correct solution. I recommend reviewing the problem statement and providing more details for a precise answer.