\(यदि (L={x:x\in \mathbb{N},,x\leq20,,x\) 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)?

Explanation opens after your attempt
Correct Answer

B. \(L=\{3,9,15\}\)

Step 1

Concept

Multiples of (3) up to (20) are (3,6,9,12,15,18).

Step 2

Why this answer is correct

Removing numbers divisible by (2), we get (3,9,15).

Step 3

Exam Tip

For combined conditions, first make a broad list and then filter it. चरण 1: (20) तक (3) के गुणज (3,6,9,12,15,18) हैं। चरण 2: इनमें (2) से विभाज्य संख्याएं हटाने पर (3,9,15) बचते हैं। चरण 3: मिली-जुली शर्तों में पहले बड़ी सूची बनाकर छांटना आसान रहता है।

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Mathematics Answer, Explanation and Revision Hints

\(यदि (L={x:x\in \mathbb{N},,x\leq20,,x\) 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: B. \(L=\{3,9,15\}\). Explanation: चरण 1: (20) तक (3) के गुणज (3,6,9,12,15,18) हैं। चरण 2: इनमें (2) से विभाज्य संख्याएं हटाने पर (3,9,15) बचते हैं। चरण 3: मिली-जुली शर्तों में पहले बड़ी सूची बनाकर छांटना आसान रहता है। / Step 1: Multiples of (3) up to (20) are (3,6,9,12,15,18). Step 2: Removing numbers divisible by (2), we get (3,9,15). Step 3: For combined conditions, first make a broad list and then filter it.

Which concept should I revise for this Mathematics MCQ?

Multiples of (3) up to (20) are (3,6,9,12,15,18).

What exam hint can help solve this Mathematics question?

For combined conditions, first make a broad list and then filter it. चरण 1: (20) तक (3) के गुणज (3,6,9,12,15,18) हैं। चरण 2: इनमें (2) से विभाज्य संख्याएं हटाने पर (3,9,15) बचते हैं। चरण 3: मिली-जुली शर्तों में पहले बड़ी सूची बनाकर छांटना आसान रहता है।