Question

25 which of the following can be the square of natural number 'n

a) Sum of the squares of first 'n' natural numbers

b) sum of the first 'n' natural numbers.
c) sum of first (n-1) natural numbers.
d) Sum of first 'n' odd natural numbers.

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Answer 1

Answer:

it should be

b) sum of first 'n' natural number