Four Numbers

Given four distinct positive integers. The sum of these numbers is equal to 18.
Additionally, it is known that the product of these four numbers is odd. Calculate this product.

Difficulty level (1 very easy - 10 very hard): 1

Arithmetic Number Theory -> Division -> Parity (Even/Odd)

Sources:

Young Mathematician Olympiad, 2019-2020, Stage A, Grades 3-4 Question 4

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