Question

Find the sum of all the natural between 50 and 500 which are divisible by 3 and 5.

Answer 1

Answer:

i hope that this will be helpful to you dear

Step-by-step explanation:

find the sum of all natural numbers between 50 and 500 which are divisible by 3 and 5. Since 3 5 are coprime any number divisible by both 3 5 will be divisible by (3 x5) = 15. (15 x 33) = 495

Answer 2

Step-by-step explanation:

it is an AP with first term 60 difference 15 and last term 495

60+(n-1)*15=495

(n-1)*15=435

n-1=29

n=30

sum=30/2(60+495)

=15*555

=8325