Question

What is the value of 1² + 3² + 5² + 7² + 9² ................ 19²?

A 1420 Correct Answer Incorrect Answer
B 1330 Correct Answer Incorrect Answer
C 1530 Correct Answer Incorrect Answer
D 1770 Correct Answer Incorrect Answer

Solution

Sum of the squares of odd number = (n(n+1)(n+2))/6 Where n = Last term = (19×20×21)/6 = 1330

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