<h1>what is the sum?-Practice sequence-Puzzle 172-By Panos Kalliantasis</h1>

 

Can you find the sum in this sequence?

Try to solve and check your answer below.

It is an AP

First term is 5

Last term is 92

d=3

92=5+(n-1)*3

92=5+3n-3

92-5+3=3n

90=3n

n=30

S(30)=(5+92)* 30/2 =1455