How many 3 digits numbers greater than 600 can be made with 0123456789?

To form a three-digit number greater than 600, the first digit must be 6, 7, 8, or 9 (4 options). The second and third digits can be any digit from 0 to 9 (10 options each). Therefore, the total number of three-digit numbers greater than 600 is calculated as follows: ( 4 \times 10 \times 10 = 400 ).