Mathematics, 03.12.2021 20:00 itzdulce

How many numbers must be selected from the set {1,2,3,4,5,6,7,8,9,10,11,12,13,14}{ 1,2,3,4,5,6,7,8,9,10,11,12,13,14} to guarantee that at least one pair of these numbers add up to 1515

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How many numbers must be selected from the set {1,2,3,4,5,6,7,8,9,10,11,12,13,14}{ 1,2,3,4,5,6,7,8,9...