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92613 x 62742241 = ? + 89 Find the value of '?'

Correct Answer: 166252

Explanation:

Given  9261 3   x   62742241   =   ?   +   89


 


Using unit digit method,


 


On LHS,


 


1 x 1 x 1 = 1


 


sqrt of last digit 1 => it must end with either 9 or 1


 


so now


 


1 x 1 = 1


 


1 x 9 = 9


 


On RHS,


 


? + 89


 


=> ? = ...1 - 89 = last digit is 11- 9 = 2


 


or


 


=> ? = ...9 - 89 = last digit is 9 - 9 = 0


 


Here in the options last digit 2 is option C.


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