1.  (12345679 x 72) = ?
A. 888888888
B. 88888888
C. 9999999998
D. 898989898

Answer: Option A

Explanation:

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