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HMMT November 2017 H1

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Two ordered pairs (a,b)(a, b) and (c,d)(c, d), where a,b,c,da, b, c, d are real numbers, form a basis of the coordinate plane if ad≠bca d \neq b c. Determine the number of ordered quadruples (a,b,c,d)(a, b, c, d) of integers between 1 and 3 inclusive for which (a,b)(a, b) and (c,d)(c, d) form a basis for the coordinate plane.

Dataset text NuminaMath olympiads. Quoted with source.

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