alleryএকটি পূর্ণসংখ্যা 3 দ্বারা বিভাজ্য হবে যদি এবং কেবল যদি তার অঙ্কগুলোর যোগফল কোন সংখ্যা দ্বারা বিভাজ্য হয়?
A3
B2
C5
D7
Answer & Solution
Correct answer: A. 3
বিভাজ্যতার নিয়ম অনুসারে অঙ্কগুলোর যোগফলকে অবশ্যই 3-এর গুণিতক হতে হবে।
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