The pattern in the table is that each column (i) (1-based) contains the values (i \times 1), (i \times 2), (i \times 3) in rows 1, 2, and 3 respectively.

• Column 1: (1×1=1), (1×2=2), (1×3=3)
• Column 2: (2×1=2), (2×2=4), (2×3=6)
• ...
• Column 5: (5×1=5), (5×2=10), (5×3=15)

The missing value is in row 2, column 5: (5×2=10).

Answer: 10

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