If 1 is added to each even digit and 1 is subtracted from each odd dig – McqOptions

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1.	If 1 is added to each even digit and 1 is subtracted from each odd digit and then how many numbers so formed will be fully divisible by 2?
A.	1
B.	2
C.	3
D.	4
E.	5
Answer» D. 4

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