Aptitude - Problems on Numbers - Discussion
Discussion Forum : Problems on Numbers - Data Sufficiency 2 (Q.No. 1)
Directions to Solve
Each of the questions given below consists of a question followed by three statements. You have to study the question and the statements and decide which of the statement(s) is/are necessary to answer the question.
1.
What is the two-digit number? | |
I. | The difference between the two-digit number and the number formed by interchanging the digits is 27. |
II. | The difference between the two digits is 3. |
III. | The digit at unit's place is less than that at ten's place by 3. |
Answer: Option
Explanation:
Let the tens and units digit be x and y respectively.
I. (10x + y) - (10y + x) 
x - y = 3.
II. x - y = 3.
III. x - y = 3.
Thus, even all the given three statements together do not give the answer.
Correct answer is (E).
Discussion:
15 comments Page 2 of 2.
Shibi said:
1 decade ago
But we can say the answer will be 52 then how can we tell that we can't be able to get the answer with the clues.
Anay said:
1 decade ago
The answer can be 63 also so I guess there is enoug amiguity in the question itself.
Swapna said:
1 decade ago
Yes. The answer is 52. And it can be solved with 1 & 3 statements only.
Afreen said:
1 decade ago
What is the use of 3rd statement? Can anyone explain about it?
Rekha said:
1 decade ago
I m not able to understand the 1st statement.
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