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How many even four digit numbers can be formed with 01234?
Even number, the last bit may be 0,2,4
When the last digit is 0, there are four kinds of first digit, three kinds of second digit and two kinds of third digit
So oil 4 * 3 * 2 = 24 kinds
When the last digit is 2,4, there are three kinds of the first digit, three kinds of the second digit and two kinds of the third digit
So oil 2 * 3 * 3 * 2 = 36 kinds
Add up to 24 + 36 = 60
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