The digits 1,2,3,4 are used to generate 256 different 4-digit numbers. The sum of the 256 numbers is

Using the digits 1,2,3,4,5,6,7 a number of 4 different digits is formed. Find

The sum of the greatest 4-digit number and the smallest 3-digit number is

The General form of a three digit number 256

Using the digits 1, 2, 3, 4, 5, 6,7, a number of 4 different digits is formed. Find

Distinct 3 digit numbers are formed using only the digits 1,2,3,4 with each digit used at most one in each number thus formed. The sum of all possible numbers so formed is

Distinct 3 digit numbers are formed using only the digits 1,2,3,4 with each digit used at most one in each number thus formed. The sum of all possible numbers so formed is

Let N be the number of 4- digit numbers which contain not more than 2 different digits. The sum of the digits of N is :

Let N be the number of 4- digit numbers which contain not more than 2 different digits. The sum of the digits of N is :

Using the digit 1, 2, 3, 4, 5, 6, and 7, a number of 4 different digit is formed find,