The conversation between human and AI assistant.
How many 3 digit even numbers can be formed from 0, 1, 2, 3, 4, 5 and 6 with no repetition?
That makes sense. What about the first digit?
For the first digit, you can choose from any of the remaining 6 digits because 0 cannot be the first digit. So, there are 6 choices for the first digit.