iran-konkur 2023 Q39

iran-konkur · Other · konkur-riazi_1402_general Not Maths
39. What is the minimum number of ordered pairs to be selected from the natural numbers such that, when selected in order, at least two of the selected pairs have the same sum of first components and the same sum of second components, with each being a multiple of 5?
(1) $13$ (2) $14$ (3) $25$ (4) $26$
\textbf{39.} What is the minimum number of ordered pairs to be selected from the natural numbers such that, when selected in order, at least two of the selected pairs have the same sum of first components and the same sum of second components, with each being a multiple of 5?

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(1) $13$ \hspace{1cm} (2) $14$ \hspace{1cm} (3) $25$ \hspace{1cm} (4) $26$
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