Aptitude - Problems on Numbers - Discussion
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Read more:"Actions speak louder than words."
- (Proverb)
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The sum of the digits of a two-digit number is 15 and the difference between the digits is 3. What is the two-digit number?
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69 | [B]. |
78 | | [C]. |
96 | [D]. |
Cannot be determined | | [E]. |
None of these |
Answer: Option E
Explanation:
Let the ten's digit be x and unit's digit be y.
Then, x + y = 15 and x - y = 3 or y - x = 3.
Solving x + y = 15 and x - y = 3, we get: x = 9, y = 6.
Solving x + y = 15 and y - x = 3, we get: x = 6, y = 9.
So, the number is either 96 or 69.
Hence, the number cannot be determined.
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Ramyasri said:
(Sun, Dec 5, 2010 12:16:24 AM)
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Take options verification we take 69 as number
6+9=15
6-9=3
Solve it we get 12=15 its not correct
If we take 96 as number
9+6=15
9-6=3
Solve it we get 18=18.
I think its is 3 option. |
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Ramesh said:
(Fri, Dec 17, 2010 06:28:00 AM)
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| This is so simple. |
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Prasad said:
(Thu, Dec 23, 2010 11:09:28 AM)
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| Yes i agree with ramyasri |
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Dominic said:
(Fri, Jul 29, 2011 03:32:42 PM)
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If we take 69 as answer.
Sum becomes:6+9=15.
But difference become: 6-9=-3.
But from the question, the sum should be 15 and the difference 3, not -3. On this note, I strongly believe that, the correct answer is 96, because.
Sum: 9+6=15,
And difference: 9-6=3. |
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Vikas said:
(Sun, Jul 31, 2011 03:35:24 PM)
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| I strongly agree witth domnic. . . The condition in the question suite only 96 and not 69. . . |
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Sneha said:
(Tue, Aug 23, 2011 07:54:10 PM)
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Can we do it like this. ?
10x+y=15.
10x-y=3.
Solving we get 10x=9, y=6.
So the number is 96? |
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Suvendu Das said:
(Tue, Nov 29, 2011 08:22:13 PM)
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| You are right. Sneha. This is the best way I beleive. |
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