To find the outcomes for the event of rolling an even number less than 5 on a regular 10-sided number cube (which has the numbers 1 through 10), we only consider the even numbers in that range.
The even numbers on a 10-sided die are: 2, 4, 6, 8, and 10.
Out of these, the even numbers that are less than 5 are: 2 and 4.
Therefore, the outcomes for the event of rolling an even number less than 5 are:
{2, 4}