Logical Reasoning - Logical Problems - Discussion
Discussion Forum : Logical Problems - Type 4 (Q.No. 10)
Directions to Solve
The logic problems in this set present you with three true statements: Fact 1, Fact 2, and Fact 3. Then, you are given three more statements (labeled I, II, and III), and you must determine which of these, if any, is also a fact. One or two of the statements could be true; all of the statements could be true; or none of the statements could be true. Choose your answer based solely on the information given in the first three facts.
10.
| Fact 1: | Some pens don't write. |
| Fact 2: | All blue pens write. |
| Fact 3: | Some writing utensils are pens. |
| I: | Some writing utensils don't write. |
| II: | Some writing utensils are blue. |
| III: | Some blue writing utensils don't write. |
Answer: Option
Explanation:
Since some pens don't write, some writing utensils don't write (statement I). Since there are blue pens and since pens are writing utensils, some writing utensils are blue (statement II). There is not enough information to support statement III.
Discussion:
21 comments Page 1 of 3.
Mahugundu Surya said:
5 months ago
I think Option A will be the correct answer.
Surya said:
5 months ago
I think A will be the correct Answer.
Sharanyaa R said:
1 year ago
I think Option A must be the right answer.
Pranav said:
5 years ago
@Lee and @Priya are right.
The answer must be D.
The answer must be D.
(3)
Hussain said:
6 years ago
A is the correct answer.
Naveen Kumar Bisai said:
8 years ago
Option D is correct.
(1)
Anil said:
9 years ago
I got it wrong too. So have done my own analysis.
The problem assumes that all pens are writing utensils. This is, in fact, true because all pens are indeed writing instruments only. However, this is not mentioned in the problem as a fact. Some will argue that this cannot be derived solely based on the information given in the facts. Similarly, the problem doesn't state that a blue pen is a pen but it is understood that a blue pen has to be a pen. So a pen has to be a writing instrument.
The problem assumes that all pens are writing utensils. This is, in fact, true because all pens are indeed writing instruments only. However, this is not mentioned in the problem as a fact. Some will argue that this cannot be derived solely based on the information given in the facts. Similarly, the problem doesn't state that a blue pen is a pen but it is understood that a blue pen has to be a pen. So a pen has to be a writing instrument.
Alex said:
10 years ago
The problem here is whether PENS are within WRITING UTENSILS.
1) If ALL "pens" are within "writing utensils" then B.
2) If SOME "pens" are within "writing utensils" then D.
Based on the given facts (without external knowledge) it is not certain that ALL pens are writing utensils (maybe some pens are for drawing or whatever). So I would say the 2nd rule applies, therefore the correct statement is D.
1) If ALL "pens" are within "writing utensils" then B.
2) If SOME "pens" are within "writing utensils" then D.
Based on the given facts (without external knowledge) it is not certain that ALL pens are writing utensils (maybe some pens are for drawing or whatever). So I would say the 2nd rule applies, therefore the correct statement is D.
(2)
Ankur Rai said:
1 decade ago
Option D is correct, as:
1- Some pens who don't write need not be a writing utensil. Hence statement 1 is incorrect.
2- Writing utensils can be of a color other than blue. No where is ti mentioned blue pens are utensils. Hence statement 2 is also incorrect.
3- Statement 3 is anyways incorrect as it says some blue pen can't write. Hence it is not possible as per the given fact.
Thus none of the statements is true and therefore option D is correct!
1- Some pens who don't write need not be a writing utensil. Hence statement 1 is incorrect.
2- Writing utensils can be of a color other than blue. No where is ti mentioned blue pens are utensils. Hence statement 2 is also incorrect.
3- Statement 3 is anyways incorrect as it says some blue pen can't write. Hence it is not possible as per the given fact.
Thus none of the statements is true and therefore option D is correct!
(1)
Ramya Reddy said:
1 decade ago
Option A should be the correct one.
Because it is stating that Some writing utensils are pens but it is not confirm that all the pens are writing utensils.
Second fact is saying all blue pens write not all pens are blue. So, I think only statement I is true.
Because it is stating that Some writing utensils are pens but it is not confirm that all the pens are writing utensils.
Second fact is saying all blue pens write not all pens are blue. So, I think only statement I is true.
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