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人気のある Word Problems >

The sum of 4 consecutive odd numbers is 40. What is the second number in this sequence?

解

T h e s u m o f 4 co n sec u t i v e o dd n u mb ers i s 40. Wha t i s t h e seco n d n u mb er in t hi s se q u e n ce ?

解

The number : 9

解答ステップ

Represent the numbers with

x

:

First number : x

Consecutive number 1 : x + 2

Consecutive number 2 : x + 4

Consecutive number 3 : x + 6

A.T.Q.:

x + x + 2 + x + 4 + x + 6 = 40

解く

x + x + 2 + x + 4 + x + 6 = 40 : x = 7

x + 2 = 7 + 2 = 9

x + 4 = 7 + 4 = 11

x + 6 = 7 + 6 = 13

The number : 9

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