What is the smallest number by which 2880 must be divided in order to make it a perfect square ?2880 को पूर्ण वर्ग बनाने के लिए कौन-सी सबसे छोटी संख्या से विभाजित करना चाहिए ?
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Correct answer: D. 5
Explanation
Prime factorising, 2880 = 2⁶ × 3² × 5. The factors 2⁶ and 3² already occur in pairs; only 5 is left unpaired. Dividing by 5 gives 576 = 24², a perfect square, so 5 is the smallest such divisor.अभाज्य गुणनखंड करने पर 2880 = 2⁶ × 3² × 5। गुणनखंड 2⁶ तथा 3² पहले से ही युग्म में हैं; केवल 5 अयुग्मित बचता है। 5 से भाग देने पर 576 = 24² प्राप्त होता है जो पूर्ण वर्ग है, अतः 5 ही सबसे छोटी अपेक्षित संख्या है।More Mathematics & Numerical Ability questions
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