A) 72
B) 54
C) 63
D) 81
Correct Answer: D
Solution :
[d] Let the unit and ten places of two digit number be x and y respectively. Then number will be 10y + x According to question 2 (10y + x) = 9 (10x + y) ? (i) and x + y = 9 ? (ii) From equation (i) and (ii), we get x=1 and y=8 Hence number = 81You need to login to perform this action.
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