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PPSC Past Paper 2025 (Junior Clerk Morning)
PPSC · 2025 · Practice with instant answers and explanations
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99 Past Paper MCQs
Question 74 of 99
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Question
74
Past Paper
PPSC
What is the formula for 1²+2²+3²+…+n²?
A
n(n+1)(2n+1)/6
B
n(n+1)/2
C
(n+1)(2n+1)
D
(n+1)(2n+1)/6
Correct Answer:
Option A — n(n+1)(2n+1)/6
Explanation:
The standard sum-of-squares formula is n(n+1)(2n+1)/6.
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