Math puzzle fans rejoice! It's your turn.

The following series represents the numbers
1 through 8 in a specific manner.

Can you identify the 9th number in this sequence?

1, 2, 3, 2, 1, 2, 3, 4, ?

HERE is our solution.

THE ANSWER: 2.

The numbers represent the number of characters in Roman numerals, beginning with 1 (I).