Question

find the sum of all integers between 100 and 550 which is not divisible by 9

Answer 1

sum = sum of all integers between 100 and 550 minus the sum of all integers divisible by 9
sum=
$\frac{449}{2} (101 + 549) - \frac{50}{2} (108 + 549)$
sum=145925-16425=129500

Answer 2

Answer:

Step-by-step explanation:

See attachment for the answer