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Question

Study the following pattern and find the sum of first 12 odd numbers :

12=122=1+332=1+3+542=1+3+5+7


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Solution

In order to find the sum of first 12 odd numbers, we will continue the pattern and observe how the sum of odd numbers are related to squares of numbers.

In 12 number in right hand side is one,

In 22 there are two odd numbers,

In 32 there is the sum of first three odd numbers,

Hence for the sum of first 12 odd numbers, 122 will be there on the left hand side in the pattern.

Thereforesumoffirst12oddnumbers=122=144.


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