Aptitude - Problems on Numbers - Discussion
Discussion Forum : Problems on Numbers - General Questions (Q.No. 6)
6.
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?
Answer: Option
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.
Discussion:
41 comments Page 5 of 5.
Dominic said:
1 decade ago
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.
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.
(1)
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