There are two cases since 0 is an even digit and it can go last, but it can't go first. So the number of choices for the first digit is different when we choose 0 for the last digit than if we choose 2 or 6 for the last digit. So we must break this problem into two cases: Case 1: 0 goes last Choose the last (5th) digit as 0 in 1 way. Choose the 1st digit any of 5 ways. {2,3,5,6,9} Choose the 2nd digit any of the remaining 4 ways. Choose the 3rd digit any of the remaining 3 ways. Choose the 4th digit either of the remaining 2 ways. That's 1×5×4×3×2 = 120 ways ending in 0 Case 2: 2 or 6 goes last: Choose the last (5th) digit as in either of 2 ways. Choose the 1st digit any of 4 ways. (CANNOT choose 0) Choose the 2nd digit any of the remaining 4 ways. (CAN choose 0) Choose the 3rd digit any of the remaining 3 ways. Choose the 4th digit either of the remaining 2 ways. That's 2×4×4×3×2 = 192 ways ending in 2 or 6 Total for the 2 cases = 120+192 = 312 Edwin