Without adding find the sum 1 + 3 + 5 + 7 + ..... + 23 = ? – InterviewSolution

1.	Without adding find the sum 1 + 3 + 5 + 7 + ..... + 23 = ?
Answer» 144Step-by-step explanation:its formula of SUMMETION if ap wheresum=(N/2)×(a+L)where n is no. of terms,a is first term; l is LAST termthus ; sum=(12/2)×(1+23)or 6×24Thus sum = 144

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