समुच्चय \(N={x:x\in \mathbb{N},,x\leq 30,,x\) (6) का गुणज है पर (12) का गुणज नहीं है(}) कौन-सा है?

Which is the set \(N={x:x\in \mathbb{N},,x\leq 30,,x\) is a multiple of (6) but not a multiple of (12)(})?

Explanation opens after your attempt
Correct Answer

A. \(N=\{6,18,30\}\)

Step 1

Concept

Multiples of (6) up to (30) are (6,12,18,24,30).

Step 2

Why this answer is correct

Remove the multiples of (12), which are (12) and (24).

Step 3

Exam Tip

When the condition says not, those elements must be excluded. चरण 1: (30) तक (6) के गुणज (6,12,18,24,30) हैं। चरण 2: इनमें (12) के गुणज (12) और (24) हटाने होंगे। चरण 3: शर्त में यदि नहीं लिखा हो, तो उन अवयवों को जरूर निकालें।

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Mathematics Answer, Explanation and Revision Hints

समुच्चय \(N={x:x\in \mathbb{N},,x\leq 30,,x\) (6) का गुणज है पर (12) का गुणज नहीं है(}) कौन-सा है? / Which is the set \(N={x:x\in \mathbb{N},,x\leq 30,,x\) is a multiple of (6) but not a multiple of (12)(})?

Correct Answer: A. \(N=\{6,18,30\}\). Explanation: चरण 1: (30) तक (6) के गुणज (6,12,18,24,30) हैं। चरण 2: इनमें (12) के गुणज (12) और (24) हटाने होंगे। चरण 3: शर्त में यदि नहीं लिखा हो, तो उन अवयवों को जरूर निकालें। / Step 1: Multiples of (6) up to (30) are (6,12,18,24,30). Step 2: Remove the multiples of (12), which are (12) and (24). Step 3: When the condition says not, those elements must be excluded.

Which concept should I revise for this Mathematics MCQ?

Multiples of (6) up to (30) are (6,12,18,24,30).

What exam hint can help solve this Mathematics question?

When the condition says not, those elements must be excluded. चरण 1: (30) तक (6) के गुणज (6,12,18,24,30) हैं। चरण 2: इनमें (12) के गुणज (12) और (24) हटाने होंगे। चरण 3: शर्त में यदि नहीं लिखा हो, तो उन अवयवों को जरूर निकालें।