Find all the integers from 100 …

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Posted by Sanket Arjun 6 years, 3 months ago
- 3 answers
Gaurav Seth 6 years, 3 months ago
The sum of all integers between 100 and 550, which are divisible by 9 is 16425.
Step-by-step explanation:
Integers between 100 and 550, which are divisible by 9 are 108, 117, 126 , ....... 549
Here,
a = 108, d = 9, an(l) = 549
By using the formula ,an = a + (n - 1)d
549 = 108 + (n -1)9
549 - 108 = 9(n -1)
441 = 9(n -1)
n -1 = 441/9
n -1 = 49
n = 49 + 1
n = 50
By using the formula ,Sum of nth terms , Sn = n/2 [a + l]
⇒ S50 = 50/2 (a + l)
⇒ S50 = 25 (108 + 549)
⇒ S50 = 25 × 657
⇒ S50 = 16425
Hence, the sum of all integers between 100 and 550, which are divisible by 9 is 16425
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Rohan Stark 6 years, 3 months ago
0Thank You