These ranged from $25 for problems that he felt were just out of the reach of the current mathematical thinking (both his and others), to several thousand dollars for problems that were both difficult to attack and mathematically significant.
その額は、現在の数学的思考（彼と他者の両方）の範囲外だと彼が感じた問題に対する25ドルから、攻撃が困難で数学的にも重要な問題については数千ドルに及んだ。