\(यदि (L={x:x\in \mathbb{N},,x\leq20,,x\) is not divisible by 2 but divisible by 3}), तो (L) का सूची रूप है?
\(If (L={x:x\in \mathbb{N},,x\leq20,,x\) is not divisible by 2 but divisible by 3}), what is the roster form of (L)?
Correct answer and explanation
B. \(L=\{3,9,15\}\)
Concept
(20) तक (3) के गुणज (3,6,9,12,15,18) हैं। / Multiples of (3) up to (20) are (3,6,9,12,15,18).
Why this answer is correct
इनमें (2) से विभाज्य संख्याएं हटाने पर (3,9,15) बचते हैं। / Removing numbers divisible by (2), we get (3,9,15).
Exam Tip
मिली-जुली शर्तों में पहले बड़ी सूची बनाकर छांटना आसान रहता है। / For combined conditions, first make a broad list and then filter it.
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