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 and explanation
A. \(N=\{6,18,30\}\)
Concept
(30) तक (6) के गुणज (6,12,18,24,30) हैं। / Multiples of (6) up to (30) are (6,12,18,24,30).
Why this answer is correct
इनमें (12) के गुणज (12) और (24) हटाने होंगे। / Remove the multiples of (12), which are (12) and (24).
Exam Tip
शर्त में यदि नहीं लिखा हो, तो उन अवयवों को जरूर निकालें। / When the condition says not, those elements must be excluded.
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