find the sum of the odd numbers between 2 and 60
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Answer:
To find the sum of first n odd numbers we can apply odd number theorem, it states that the sum of first n odd numbers is equal to the n^2. The number of odd numbers between 1 & 60 are: 29. sum of first 29 odd numbers = 29^2 = 841
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Answer:
The odd numbers between 0 and 50 are 1,3,5,7,9…49
Therefore, it can be observed that these odd numbers are in an A.P.
a=1,d=2,l=49
l=a+(n−1)d
49=1+(n−1)2
48=2(n−1)
n−1=24
n=25
S n
= 2n (a+l)S 25
= 225(1+49)
= 225×50
=625
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