A 4 digit number is formed : 1968 if the digit '9' is replaced by 7 th – InterviewSolution

1.	A 4 digit number is formed : 1968 if the digit '9' is replaced by 7 the new number is 1768 by how much would the original number 1968 decrease if 6 is replaced by 4 a) 2 b) 20 c)200 d) none of these
Answer» (B) 20 is CORRECT ANSWER

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