UPSC Prelims 2016·CSAT·Logical Reasoning·Deductive Logic

Consider the following statements: 1. Either A and B are of the same age or A is older than B 2. Either C and D are of the same age or D is older than C 3. B is older than C Which of the following conclusions can be drawn from the above statements?

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Last updated 23 May 2026, 3:31 pm IST
  1. AA is older than B
  2. BB and D are of the same age
  3. CD is older than C
  4. DA is older than CCorrect

Explanation

To solve this, let us represent the statements as mathematical inequalities: Statement 1: A is greater than or equal to B. Statement 2: D is greater than or equal to C. Statement 3: B is strictly greater than C. Now, we combine Statement 1 and Statement 3: If A is either older than B or the same age as B, and B is definitely older than C, then A must be older than C. For example, if A and B are both 20, and C is 18, then A is older than C. If A is 22 and B is 20, then A is still older than C. In every possible scenario, A is older than C. Conclusion D is correct because it is a logical certainty derived from the given information. Other options like A, B, or C are possibilities but are not necessarily true in every case.
Logical Reasoning: Consider the following statements: 1. Either A and B are of the same age or A is older than B 2. Either C and D are of t

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