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.
V.Keerthana said:
1 decade ago
May be C correct answer because it provides only required information.
Rahul Khot said:
1 decade ago
By option A we can say answer is 34 or 43, but we can't say perfectly which is the answer.
But by option C we can definitely say, answer is 43. So answer could be option C.
But by option C we can definitely say, answer is 43. So answer could be option C.
(1)
Ravi Ranjan said:
9 years ago
The correct option is undoubtedly C.
Pooja said:
9 years ago
I think the correct answer is D.
Sankarilakshmi said:
9 years ago
Yes agree. The correct answer is D.
Pankaj Saini said:
9 years ago
I think option D is right.
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.
Charanya said:
7 years ago
I think its option A. We get answer by I and II only.
RAHUL robin said:
7 years ago
The Correct option will be C.
(1)
Chetna said:
3 years ago
D should be the correct answer. I mean 43 is the only possibility such that the sun is 7 and the difference is 1.
So,it's D.
So,it's D.
(3)
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