How many 3 digit even numbers can be formed from 0 , 1 , 2 , 3 , 4 , 5 and 6 with no repetition ?
How many even numbers of three digits can be formed by using the digits 1 , 2 , 3 , 4 , 5 and 6 if each digit is used -LRB- at least -RRB- once ?