In the following question, select the number which can be placed at the sign of question mark (?) from the given alternatives.
Show answer & explanation
Correct answer: A
Explanation
Pattern: (R1×R2×R3)-1=R4
Column 1: (2×4×5)-1=40-1=39
Column 2: (3×3×6)-1=54-1=53
Same apply to column 3:
= (7×2×3)-1
= 42-1
= 41
Hence, the correct answer is option (1).