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Answers
How to Find the Sum of First 37 Odd Numbers?
The below workout with step by step calculation shows how to find what is the sum of first 37 odd numbers by applying arithmetic progression. It's one of the easiest methods to quickly find the sum of given number series.
step 1 Address the formula, input parameters & values.
Input parameters & values:
The number series 1, 3, 5, 7, 9, . . . . , 73.
The first term a = 1
The common difference d = 2
Total number of terms n = 37
step 2 apply the input parameter values in the AP formula
Sum = n/2 x (a + Tn)
= 37/2 x (1 + 73)
= (37 x 74)/ 2
= 2738/2
1 + 3 + 5 + 7 + 9 + . . . . + 73 = 1369
Therefore, 1369 is the sum of first 37 odd numbers.
The first odd number is 1.
n = 37
d = 2
a = 1
Sn =n/2 [2a + (n-1)d]
Therefore S37 = 37/2 [2*1 + 36 * 2]
= 37/2 * (2 + 72)
= 37/2 * 74
= 37 * 37
= 1369.