Without Actual adding, find the sum 1+3+5+7+9+11
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Answer:
1+3+5+7+9+11 = 36
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Explanation:
i.e. 121 =1+3+5+7+9+11+13+15+17+19+21. Thus , 121 is a perfact square. Since, 55 cannot be expressed as the sum of successive old numbers starting from 1.
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