Answer: Option B First Method Row-wise Logic: First element + second element = Third Element. 6 + 9 = 15 8 + 12 = 20 4 + 6 = 10 So, required number is 10. Second Method Logic: Second Row element - first row element = Result * 2 = Third Row Element. Column 1: 8 - 6 = 2 2 *2 = 4 Column 2: 12 - 9 = 3 3 *2 = 6 Column 3: 20 - 15 = 5 5 * 2 = 10. Required Number is 10. Third Method: In the First row, 6*(3/2)= 9. 6*(5/2) = 15. In the second row, 8*(3/2) = 12. 8*(5/2) = 20. hence, In the third row, missing number, = 4*(5/2) = 10.
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