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divisibility-sum MCQ Questions for Class 11

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Practice Questions

1 questions tagged with divisibility-sum.

यदि \(A=\{1,2,3,4\}\) और \(B=\{1,2,3,4\}\) है, तो \(A\times B\) में ऐसे कितने युग्म ((x,y)) हैं जिनके लिए (x+y) (3) से विभाज्य है?

If \(A=\{1,2,3,4\}\) and \(B=\{1,2,3,4\}\), how many pairs ((x,y)) in \(A\times B\) have (x+y) divisible by (3)?

Explanation opens after your attempt
Correct Answer

B. (5)

Step 1

Concept

The sum can be (3) or (6). Valid pairs are ((1,2),(2,1),(2,4),(3,3),(4,2)), so there are (5) pairs.

Step 2

Why this answer is correct

The correct answer is B. (5). The sum can be (3) or (6). Valid pairs are ((1,2),(2,1),(2,4),(3,3),(4,2)), so there are (5) pairs.

Step 3

Exam Tip

योग (3) या (6) हो सकता है। सही युग्म ((1,2),(2,1),(2,4),(3,3),(4,2)) हैं, इसलिए (5) युग्म हैं।

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