Aptitude - Problems on Numbers - Discussion
Discussion Forum : Problems on Numbers - Data Sufficiency 2 (Q.No. 2)
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.
2.
What is the two-digit number? | |
I. | Sum of the digits is 7. |
II. | Difference between the number and the number obtained by interchanging the digits is 9. |
III. | Digit in the ten's place is bigger than the digit in the unit's place by 1. |
Answer: Option
Explanation:
Let the tens and units digit be x and y respectively.
I. x + y = 7.
II. (10x + y) - (10y + x) = 9 
x - y = 1.
III. x - y = 1.
Thus, I and II as well as I and III give the answer.
Correct answer is (E).
Discussion:
26 comments Page 2 of 3.
Charanya said:
7 years ago
I think its option A. We get answer by I and II only.
Rutuja kapadnis said:
8 years ago
Answer is E.
Eg. 99 (99-99)=0 nd 9=9.
Eg. 99 (99-99)=0 nd 9=9.
Pankaj Saini said:
9 years ago
I think option D is right.
Sankarilakshmi said:
9 years ago
Yes agree. The correct answer is D.
Anurag said:
1 decade ago
I think option (c) or even (a) is correct because I'm getting just "43" as answer.
Ravi Ranjan said:
9 years ago
The correct option is undoubtedly C.
V.Keerthana said:
1 decade ago
May be C correct answer because it provides only required information.
Amit Mandliya said:
1 decade ago
C should be the answer. As I & III are providing required information.
Ankit kaswa said:
1 decade ago
Correct answer will be C (I & III only) because II give information about difference, so using I & II we can gate 43 or 34.
Shweta said:
1 decade ago
The answer should be C x+y=7, x-y=1.
Post your comments here:
Quick links
Quantitative Aptitude
Verbal (English)
Reasoning
Programming
Interview
Placement Papers