1+2+3+ ..........+50 =? 

A    3645 

B   1275 

C    7512 

D    5062 

Solution

Correct Answer: Option B

  আমরা জানি ,
         সমষ্টি s = n(n+1)/2
                     =50(50+1)/2   [এখানে n =20]
                      =25×51
                      =1275 

Practice More Questions on Our App!

Download our app for free and access thousands of MCQ questions with detailed solutions