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AIME 2009a Problem 9

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A game show offers a contestant three prizes A, B and C, each of which is worth a whole number of dollars from $1\$ 1 to $9999\$ 9999 inclusive. The contestant wins the prizes by correctly guessing the price of each prize in the order A, B, C. As a hint, the digits of the three prices are given. On a particular day, the digits given were 1,1,1,1,3,3,31, 1, 1, 1, 3, 3, 3. Find the total number of possible guesses for all three prizes consistent with the hint.

Dataset text AIME 1983 to 2026. Quoted with source.

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