60 থেকে 80 এর মধ্যবর্তী বৃহত্তম ও ক্ষুদ্রতম মৌলিক সংখ্যার বিয়োগফল কত হবে?
A. 8
B. 12
C. 18
D. 140
সঠিক উত্তরঃ
C.
18
Explanation:
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