Question

find the sum of all odd number lying between 101 and 200 which are divisible by 3 ​

Answer 1

Step-by-step explanation:

ATQ

series will be

105,111,117,123......................195

an=a+(n-1)d

a=105

d=6

an=195

195=105+(n-1)6

195-105=(n-1)6

90=(n-1)6

15+1=n

n=16

sum is

a

sn=n(a+l)/2

=16(105+195)/2

= 8(300)

= 2400

Answer 2

Answer:

refers to the attachment....