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Question

(12345679 x 72) = ?


Options:
A .  88888888
B .  888888888
C .  898989898
D .  9999999998
Answer: Option B

12345679 x 72 = 12345679 x (70 +2) = 12345679 x 70 + 12345679 x 2 = 864197530 + 24691358 = 888888888


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