The sum of two consecutive integers is 55. Which pair are those integers?

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Multiple Choice

The sum of two consecutive integers is 55. Which pair are those integers?

Explanation:
Think of two consecutive integers as n and n+1. Their sum is (n) + (n+1) = 2n + 1. Set this equal to 55: 2n + 1 = 55, so 2n = 54 and n = 27. The pair is 27 and 28, since 27 + 28 = 55. Other options don’t fit: 28 and 29 sum to 57; 25 and 30 aren’t consecutive; 26 and 27 sum to 53.

Think of two consecutive integers as n and n+1. Their sum is (n) + (n+1) = 2n + 1. Set this equal to 55: 2n + 1 = 55, so 2n = 54 and n = 27. The pair is 27 and 28, since 27 + 28 = 55.

Other options don’t fit: 28 and 29 sum to 57; 25 and 30 aren’t consecutive; 26 and 27 sum to 53.

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