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Mathematics, 02.03.2020 18:28 kikiwaka1

How many ordered pairs of integers (a, b) are needed to guarantee that there are two ordered pairs and such that aโ‚ and aโ‚‚ have the same remainder when divided by 5 and bโ‚ and bโ‚‚ have the same remainder when divided by 5?

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How many ordered pairs of integers (a, b) are needed to guarantee that there are two ordered pairs...
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