the sum of 5 consecutive integers is 200. What is the fifth number in this sequence?

解

t h e s u m o f 5 co n sec u t i v e in t e g ers i s 200. Wha t i s t h e f i f t h n u mb er in t hi s se q u e n ce ?

The number : 42

解答ステップ

Represent the numbers with

x

First number : x

Consecutive number 1 : x + 1

Consecutive number 2 : x + 2

Consecutive number 3 : x + 3

Consecutive number 4 : x + 4

A.T.Q.:

x + x + 1 + x + 2 + x + 3 + x + 4 = 200

解く

x + x + 1 + x + 2 + x + 3 + x + 4 = 200 : x = 38

x + 1 = 38 + 1 = 39

x + 2 = 38 + 2 = 40

x + 3 = 38 + 3 = 41

x + 4 = 38 + 4 = 42

The number : 42