InterviewSolution
Saved Bookmarks
InterviewSolution
| 1. |
The Number Obtained By Interchanging The Two Digits Of A Two-digit Number Is Less Than The Original Number By 45. If The Sum Of The Two Digits Of The Number So Obtained Is 13, Then What Is The Original Number ? |
|
Answer» Let the number be in the form of 10a + B Number formed by interchanging a and b = 10b + a. a + b = 13 --- (1) 10b + a = 10a + b - 45 45 = 9a - 9B => a - b = 5 --- (2) Adding (1) and (2), we get 2a = 18 => a = 9 and b = 4 The number is: 94. Let the number be in the form of 10a + b Number formed by interchanging a and b = 10b + a. a + b = 13 --- (1) 10b + a = 10a + b - 45 45 = 9a - 9b => a - b = 5 --- (2) Adding (1) and (2), we get 2a = 18 => a = 9 and b = 4 The number is: 94. |
|