[" How many numbers can be formed "],[" using all the digits "1,2,3,4,3,2,1" such "],[" that even digits always occupy even "],[" places "]

How many even numbers can be formed by using all the digits 2, 3, 4, 5, 6?

How many numbers can be formed using the digits 1,2,3,4,2,1 such that even digits occupies even place?

How many numbers can be formed using the digits 1, 2, 3, 4, 3, 2, 1 so that the odd digits always occupy the odd places?

How many numbers can be formed with the digits 1, 2, 3, 4, 3, 2, 1 so that the odd digits always occupy the odd places?

How many 5-digit even numbers can be formed using the digits 1,2,5,4,5 ?

The number of different numbers that be can be formed by using all the digits 1,2,3,4,3,2,1 so that odd digits always occupy the odd places is

How many numbers can be formed using the digits 2, 3,4, 5, 2,4, 5, 5 such that even digits occupy even places.

How many numbers can be formed with the digits 1,2,3,4,3,2,1 so that the odd digits always occupy the odd places?

How many numbers can be formed with the digits 1, 2, 3, 4, 3, 2, 1 so that odd digits always occupy the odd places?