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3 years ago

The sum of 5 consecutive integers is 265. What is the fifth number in this sequence ?

1 answer:

6 0

Hello,
Let's assume n,n+1,n+2,n+3,n+4 the 5 numbers

n+(n+1)+...+(n+4)=5n+10=265
5n=265-10
5n=255
n=51
The 5th number is 51+4=55

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