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
A. \(N=\{6,18,30\}\)
Concept
Multiples of (6) up to (30) are (6,12,18,24,30).
Why this answer is correct
Remove the multiples of (12), which are (12) and (24).
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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