Make a list of 5 numbers with a mean of 12 and a mode of 15

The mean is the average. Mode is a number that appears the most.

The mean is 12, with 5 numbers, this means the total of the numbers need to sum to 12 x 5 = 60

The mode is 15, so it needs to be listed at least 2 times.

a, b, c, 15, 15

15 + 15 = 30

30 is half of 60, so the other 3 numbers need to sum to 30

Pick any 3 numbers that will sum to 30:

5 + 12 + 13 = 5 numbers can be: 5 , 12, 13, 15, 15