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人気のある Word Problems >

The sum of 5 consecutive integers is 110 .What is the fourth 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 110 . Wha t i s t h e f o u r t h n u mb er in t hi s se q u e n ce ?

解

The number : 23

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 = 110

解く

x + x + 1 + x + 2 + x + 3 + x + 4 = 110 : x = 20

x + 1 = 20 + 1 = 21

x + 2 = 20 + 2 = 22

x + 3 = 20 + 3 = 23

x + 4 = 20 + 4 = 24

The number : 23

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