\(यदि (A={x\in\mathbb{N}:x\le30,\ x\) पूर्ण वर्ग है\(}) और (B={x\in\mathbb{N}:x\le30,\ 3\mid x}), तो (A-B) क्या है\)?

\(If (A={x\in\mathbb{N}:x\le30,\ x\) is a perfect square\(}) and (B={x\in\mathbb{N}:x\le30,\ 3\mid x}), what is (A-B)\)?

Explanation opens after your attempt
Correct Answer

A. ({1,4,16,25})

Step 1

Concept

Perfect squares up to (30) are ({1,4,9,16,25}). Removing (9), which is divisible by (3), gives ({1,4,16,25}).

Step 2

Why this answer is correct

The correct answer is A. ({1,4,16,25}). Perfect squares up to (30) are ({1,4,9,16,25}). Removing (9), which is divisible by (3), gives ({1,4,16,25}).

Step 3

Exam Tip

(30) तक पूर्ण वर्ग ({1,4,9,16,25}) हैं। इनमें (3) से विभाज्य (9) हटाने पर ({1,4,16,25}) मिलता है।

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Mathematics Answer, Explanation and Revision Hints

\(यदि (A={x\in\mathbb{N}:x\le30,\ x\) पूर्ण वर्ग है}) और \(B={x\in\mathbb{N}:x\le30,\ 3\mid x}\), तो (A-B) क्या है? \(/ If (A={x\in\mathbb{N}:x\le30,\ x\) is a perfect square\(}) and (B={x\in\mathbb{N}:x\le30,\ 3\mid x}), what is (A-B)\)?

Correct Answer: A. ({1,4,16,25}). Explanation: (30) तक पूर्ण वर्ग ({1,4,9,16,25}) हैं। इनमें (3) से विभाज्य (9) हटाने पर ({1,4,16,25}) मिलता है। / Perfect squares up to (30) are ({1,4,9,16,25}). Removing (9), which is divisible by (3), gives ({1,4,16,25}).

Which concept should I revise for this Mathematics MCQ?

Perfect squares up to (30) are ({1,4,9,16,25}). Removing (9), which is divisible by (3), gives ({1,4,16,25}).

What exam hint can help solve this Mathematics question?

(30) तक पूर्ण वर्ग ({1,4,9,16,25}) हैं। इनमें (3) से विभाज्य (9) हटाने पर ({1,4,16,25}) मिलता है।