Find the pair of integers with the greatest sum if the sum of two consecutive integers is less than 83

sbrigynt7b

sbrigynt7b

Answered question

2022-11-13

Find the pair of integers with the greatest sum if the sum of two consecutive integers is less than 83

Answer & Explanation

Emma Singleton

Emma Singleton

Beginner2022-11-14Added 11 answers

Two integers can only add to become another integer. The greatest integer less than 83 is 82.

However, you can't have two consecutive integers adding up to give an even number, so we're going to have to pick the greatest odd number that's smaller than 83, which is of course 81.

So we are looking for two consecutive integers that add up to 81. We are looking for a number a and the number after it a+1.
To do this, we can add them and set them equal to 83.

a+(a+1)=83
2a=82

a=41
(a+1)=42
41+42=83

And that is good information, by we are looking for the biggest odd number that's smaller than 83 so we can subtract 1 from both numbers.

(a−1)=40
a=41
40+41=81

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