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Question


Find the rightmost non-zero integer of the expression 1430343+1470367?


Options:
A .   3
B .   9
C .   7
D .   1
Answer: Option C
:
C

It can be easily observed that 1470367 has more number of zeroes as compared to


1430343. hence, the rightmost non-zero integer will depend on the unit digit of only 1430343, which in turn will depend on the unit digit of 3343


343 can written as 4k+3


In the power cycle of 3 (3,9,7,1), the third digit is 7. Hence, the last non-zero integer in the expression is 7.



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