A) 9
B) 6
C) 12
D) 3
Correct Answer: D
Solution :
[d] Let number is \[10x+y\] (x, y are the digits). |
Number obtained by interchanging the digits \[=10x+y\] |
\[10x+y-(10y+x)=27\] |
\[9(x-y)=27\] |
\[x-y=3\] |
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