Use the numbers 0, 1, 2, 3 and 4 to form a five digit number without repetition, then how many even numbers are adjacent to the numbers 1 and 2?

Use the numbers 0, 1, 2, 3 and 4 to form a five digit number without repetition, then how many even numbers are adjacent to the numbers 1 and 2?

If the last digit is 0, then 1, 2 are a group, and can exchange positions, there are 2a33 = 12. If the last digit is 2, then the fourth digit is 1. First row 0 on the second or third digit, there are two methods, then arrange the remaining two numbers, there are two methods, so there are 2a22 = 4

Of the three digits that can be divided by 3 and 5 at the same time, the largest odd number is______ The smallest even number is______ ．

From the analysis, it can be concluded that: the odd number divided by 5 must be 5, the even number divided by 5 must be 0, among the three digits that can be divided by 3 and 5 at the same time, if the largest odd number is required, then the hundred is 9, and if the ten digits are divided by 3, then the largest odd number is 7. So the largest odd number is 975. Among the three digits that can be divided by 3 and 5 at the same time, the smallest even number is required

A two digit number is not only a multiple of 5, but also a factor of 3. If the number is odd, what is the minimum; if it is even, what is the maximum?

Odd 15
No even number