PYQ
MediumDGVCL Vidyut Sahayak JE (Electrical)2024
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Find the sum of cubes of the first 24 natural numbers.

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Answer & Explanation
Correct AnswerD. 90000

Quick Explanation

Sum of cubes = [n(n+1)/2]^2. For n=24: [24×25/2]^2 = 300^2 = 90000.

Formula / Key Relation

13+...+n3 = [n(n+1)/2]2

Detailed Explanation

Sum of cubes = [n(n+1)/2]^2. For n=24: [24×25/2]^2 = 300^2 = 90000.

Quick Trick

Use the standard formula directly after identifying the quantities.

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