# Which Set Is Infinite? {x | X ∈ N And X < 20} {x | X Is An Improper Fraction} {3, 5, 7, . . ., 99} O

**Answer:**

The set of natural numbers less than 20 is finite: {0, 1, 2, ..., 19} has 20 elements.

The set of inappropriate fractions is infinite.

The set of odd numbers greater than 1 and less than 100 is finite: {3, 5, 7, ..., 99} has 49 elements.

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