\(यदि (A={x:x\in \mathbb{N}, x\le 12}) और (B={x:x\in \mathbb{N}, x\) वर्ग संख्या है\(, x\le 12}), तो (A-B) में कितने अवयव हैं\)?

\(If (A={x:x\in \mathbb{N}, x\le 12}) and (B={x:x\in \mathbb{N}, x\) is a square number\(, x\le 12}), how many elements are in (A-B)\)?

Explanation opens after your attempt
Correct Answer

B. (9)

Step 1

Concept

(A) has (12) elements and \(B=\{1,4,9\}\). Thus (A-B) has (12-3=9) elements.

Step 2

Why this answer is correct

The correct answer is B. (9). (A) has (12) elements and \(B=\{1,4,9\}\). Thus (A-B) has (12-3=9) elements.

Step 3

Exam Tip

(A) में (12) अवयव हैं और \(B=\{1,4,9\}\) है। इसलिए (A-B) में (12-3=9) अवयव होंगे।

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Mathematics Answer, Explanation and Revision Hints

\(यदि (A={x:x\in \mathbb{N}, x\le 12}) और (B={x:x\in \mathbb{N}, x\) वर्ग संख्या है, x\le 12}), तो (A-B) में कितने अवयव हैं? \(/ If (A={x:x\in \mathbb{N}, x\le 12}) and (B={x:x\in \mathbb{N}, x\) is a square number\(, x\le 12}), how many elements are in (A-B)\)?

Correct Answer: B. (9). Explanation: (A) में (12) अवयव हैं और \(B=\{1,4,9\}\) है। इसलिए (A-B) में (12-3=9) अवयव होंगे। / (A) has (12) elements and \(B=\{1,4,9\}\). Thus (A-B) has (12-3=9) elements.

Which concept should I revise for this Mathematics MCQ?

(A) has (12) elements and \(B=\{1,4,9\}\). Thus (A-B) has (12-3=9) elements.

What exam hint can help solve this Mathematics question?

(A) में (12) अवयव हैं और \(B=\{1,4,9\}\) है। इसलिए (A-B) में (12-3=9) अवयव होंगे।