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 1 of 6.
Mahantesh said:
2 decades ago
(10x + y) - (10y + x) = 36
Mahant said:
2 decades ago
Then, (10x + y) - (10y + x) = 36
simlify this
simlify this
Venkat said:
1 decade ago
9x-9y=36
9(x-y)=36
x-y=4.
9(x-y)=36
x-y=4.
Priya P. said:
1 decade ago
Thanks.. Venkat
Manasa said:
1 decade ago
Explain this step : (10x + y) - (10y + x) = 36
How 10x+y got ?
How 10x+y got ?
Bhupendra said:
1 decade ago
Why would we take 10 we can take 15 or other no also ?
Shu said:
1 decade ago
Why have they taken 10 only why not 9 or 4?
Punit Mandelia said:
1 decade ago
Actually it indicates the place, the order of place is hundred tens and unit place. So when we are talking about interchanging digit we are writing in place as we are interchanging there place. Got it.?
Jisha said:
1 decade ago
Please explain properly step by step.
Meghna jain said:
1 decade ago
Please explain in simple form.
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