1. The problem asks to analyze Exercise 20, which appears to involve interpreting or solving problems related to graphs and numbers given in the prompt. 2. From the provided data, we have three graphs with numbers arranged in rows: - Graph 1 (top-right): Top row: 25; Second row: 3, 5, 15; Third row: 10, 15 - Graph 2 (top-right): Top row: 81; Second row: 17, 15; Third row: 4, 3 - Graph 3 (top-right): Top row: 4; Second row: 2, 4; Third row: 3, 5 3. Additionally, two bottom-left graphs are given: - Graph 1 (bottom-left): Top row: empty; Second row: 10; Third row: 7, 6, 9, 8 - Graph 2 (bottom-left): Top row: empty; Second row: 8; Third row: 7, 6, 10 4. The problem likely involves finding relationships or patterns between these numbers, such as factors, sums, or other quantitative reasoning. 5. Without explicit instructions, a common approach is to analyze factors or sums: - For Graph 1 (top-right), 25 is the top number, and 3, 5, 15 are in the second row. Note that 5 and 15 are factors or multiples related to 25. - For Graph 2 (top-right), 81 is the top number, with 17 and 15 below, and 4 and 3 below that. 81 is $9^2$, and 3 and 4 are factors of 12, but 17 and 15 do not directly factor 81. - For Graph 3 (top-right), 4 is the top number, with 2 and 4 below, and 3 and 5 below that. 6. For bottom-left graphs, the top row is empty, so the focus is on the second and third rows. 7. Since the problem is not fully specified, the best we can do is summarize the data and suggest that the exercise involves analyzing these numbers for patterns or relationships. Final answer: The exercise involves analyzing the given graphs and numbers to find quantitative relationships such as factors or sums.