A) 25
B) 26
C) 27
D) 28
Correct Answer: A
Solution :
Let the number be \[\left( 10x+y \right)\] \[\because \] \[x+y=7\] ?(i) and \[(10y+x)-(10x+y)=27\] \[\Rightarrow \] \[9y-9x=27\] \[\Rightarrow \] \[y-x=3\] ?(ii) \[\therefore \]From Eqs. (i) and (ii), \[x=2\] and \[y=5\] \[\therefore \]Original number = 25You need to login to perform this action.
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