Aptitude - Problems on Numbers - Discussion
Discussion Forum : Problems on Numbers - General Questions (Q.No. 3)
3.
The difference between a two-digit number and the number obtained by interchanging the positions of its digits is 36. What is the difference between the two digits of that number?
Answer: Option
Explanation:
Let the ten's digit be x and unit's digit be y.
Then, (10x + y) - (10y + x) = 36
9(x - y) = 36
x - y = 4.
Video Explanation: https://youtu.be/7QOJjAmGVx0
Discussion:
59 comments Page 4 of 6.
Suji said:
1 decade ago
Thank you for explanation.
Vishal bhosale said:
1 decade ago
Thank you explain it.
Bhupathi raj said:
10 years ago
Anymore shortcut. The answer complete only two steps please explain.
Abhijit Kale said:
10 years ago
Guys I agree to this explanation but I found a no which matches the criteria of this question. no is 73. If we reverse is we will get 37.
And difference between 73 and 37 is 36. And difference between digits is 3. Am I wrong?
And difference between 73 and 37 is 36. And difference between digits is 3. Am I wrong?
Abhijit Kale said:
10 years ago
Guys I agree to your explanation but I found a No. 73. If we reverse it we'll get a no 37. And difference between these two nos is 36.
And difference between digits of this no is 3. All these things matches the criteria of this question except my answer. Please rectify me if I am wrong.
And difference between digits of this no is 3. All these things matches the criteria of this question except my answer. Please rectify me if I am wrong.
Nagma jabee said:
10 years ago
Thanks @Nikhilesh and Isran.
Qasim said:
10 years ago
Why do we interchanging the number?
Balaji said:
10 years ago
@Abhijit.
The number your are interchanging is 73 so you have you have to see the difference between 7 and 3 which is equal to 4. And you can check this with the number 84 & 95.
The number your are interchanging is 73 so you have you have to see the difference between 7 and 3 which is equal to 4. And you can check this with the number 84 & 95.
Bgnr said:
9 years ago
Why we take x and why in addition to 10x and 10y, can anyone explain?
Kama gupta said:
9 years ago
By trick,
For difference = d/9 and for sum = s/11.
So,
Difference = 36/9 = 4 (answer).
For difference = d/9 and for sum = s/11.
So,
Difference = 36/9 = 4 (answer).
(2)
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