How many numbers can be formed using all the digits 1, 2, 3, 4, 3, 2, 1 such that even digits alwaysoccupy even plac

How many different 3-digit even numbers can be formed so that all the digit are different?

How many even numbers less than 500 can be formed using the digits 1, 2, 3, 4 and 5? Each digit may be used only once in any number.

How many four-digit even numbers can be formed from the set         {0, 1, 2, 3, 4, 5, 6, 7} if repetition of digits is NOT allowed?1 pointA. 1470B. 750C. 720D. 540

How many 7-digit even numbers less than 3 000 000 can be formed using all the digits1, 2, 2, 3, 5, 5, 6 ?

How many 3-digit positive integers exist whose digits add up to give an even number