1. We are given three rows of numbers with sums: - Row 1: 4, 3, 6, 10 = 13 - Row 2: 3, 4, 9, 12 = 15 - Row 3: 13, 16, 1, 20 = 21 2. The problem seems to involve verifying or understanding how these equalities hold or relate. 3. First, sum each row: - Row 1 sum: $4 + 3 + 6 + 10 = 23$, but equals 13 given, so possibly a different operation or typo. - Row 2 sum: $3 + 4 + 9 + 12 = 28$, but equals 15 given. - Row 3 sum: $13 + 16 + 1 + 20 = 50$, but equals 21 given. 4. Since sum doesn't match given totals, assume perhaps the last number is unrelated or these are part of a puzzle. 5. Alternatively, find a pattern: could the equals number be the count of some property like the maximum, minimum, or differences. 6. Check difference of max-min in each row: - Row 1 max=10, min=3, difference = $10 - 3 = 7$ (not 13) - Row 2 max=12, min=3, difference = $12 - 3 = 9$ (not 15) - Row 3 max=20, min=1, difference = $20 - 1 = 19$ (not 21) 7. No obvious pattern emerges. 8. Conclusion: Without further context, the problem is either incomplete or represents arbitrary values not directly related by equality. Final answer: The sums of the rows do not match the given equal values; more information is needed to interpret the values after the equals signs.