6, 72 আৰু 120 ৰ LCM হ'ল:
A180
B240
C720
D360
Answer & Solution
Correct answer: D. 360
1. প্ৰতিটো সংখ্যাক মৌলিক উৎপাদকৰ গুণফল হিচাপে লিখক: 6 = 2 x 3।
2. 72 = 2^3 x 3^2 আৰু 120 = 2^3 x 3 x 5।
3. LCM-এ দেখা দিয়া প্ৰতিটো মৌলিক সংখ্যাৰ সৰ্বোচ্চ ঘাত লয়: 2^3, 3^2 আৰু 5।
4. গতিকে LCM = 8 x 9 x 5 = 360।
5. 180-ত 2 ৰ এটা উৎপাদক বাদ পৰিছে আৰু 240-ত 3 ৰ এটা উৎপাদক বাদ পৰিছে, গতিকে কোনোটোৱেই 72 ৰ গুণিতক নহয়।
_Source: syllabus Maths, Ch 1 'Real Numbers', S1.2 The Fundamental Theorem of Arithmetic_
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