13 +23 +33 + .............. +103 = কত ?
Solution
Correct Answer: Option A
আমরা জানি,
Sum = [{n×(n+1)}/2]²
={(10×11)/2}²
=55²
=3025
Sum = [{n×(n+1)}/2]²
={(10×11)/2}²
=55²
=3025
Practice More Questions on Our App!
Download our app for free and access thousands of MCQ questions with detailed solutions