A) 52
B) 43
C) 61
D) 37
E) 27
Correct Answer: A
Solution :
Let the original number be 10y + x. If the number is interchanged it will be 10x + y. Now, according to the question, or, 9y - 9x = 27 or, y - x = 3 ... (i) Again, x + y = 7 ... (ii) Adding eqn (i) and (ii), we get or, 2y = 10 \[\therefore \] y = 5 Putting the value of y in eqn (i), we get x=2 Hence, the number is 52.You need to login to perform this action.
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