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১ থেকে ৯৯ পর্যন্ত সংখ্যার যোগফল---
৪৮৫০
৪৯৫০
৫৭৫০
৫৯৫০
ANSWER : 2
Descrption
<p>যোগফল = {(প্রথম সংখ্যা + শেষ সংখ্যা) × পদ সংখ্যা} ÷ ২</p><p>= {(১ + ৯৯) × ৯৯}÷ ২</p><p>= (১০০× ৯৯) ÷ ২</p><p>= ৪৯৫০</p>
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