सबसे छोटा प्राकृतिक (k) क्या है जिसके लिए (k!), (72) से विभाज्य हो?
What is the least natural (k) for which (k!) is divisible by (72)?
Explanation opens after your attempt
C. (6)
Concept
\(72=2^3\cdot3^2\), and (6!) contains these factors. In such questions, use prime factorization of the number.
Why this answer is correct
The correct answer is C. (6). \(72=2^3\cdot3^2\), and (6!) contains these factors. In such questions, use prime factorization of the number.
Exam Tip
\(72=2^3\cdot3^2\) है और (6!) में ये गुणनखंड मिल जाते हैं। ऐसे प्रश्नों में संख्या का अभाज्य गुणनखंडन करें।
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