How many positive integers less than ten thousand are multiples of both eight and eighteen.

A 70
B 72
C 138
D 139

Correct Answer: 138

এখানে, ৪ ও 18 এর ল.সা.গু = 72 .:. নির্ণেয় পূর্ণ সংখ্যা = 1000072 = 138.8≈ 138 টি
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