How many even numbers of four digits can be formed with the digits 0,1,2,3,4,5 and 6 no digit being used more than once?

How many number 4 of four digits can be formed with the digits 1,3,3,0?

The number of even numbers of three digits which can be formed with digits 0,1,2,3,4 and 5 (no digit being used more than once) is

How many numbers of four digits can be formed with the digits 1,2,4,5,7 no digit being repeated?

How many numbers of four digits greater than 2300 can be formed with the digits 0,1,2,3,4,5 and 6; no digit being repeated in any number?

How many numbers of four digits can be formed with the digits 1,2,3,4, and 5? (if repetition of digits is not allowed).

How many numbers of four digits can be formed with the digits 1,2,3,4,5 if the digits can be repeated in the same number?