The sum of the digits in the unit's place of all the 4-digit numbers formed by 3,4,5 and 6, without repetition , is

The sum of the digits in the unit's place of all the 4-digit numbers formed by using the numbers 3,4,5 and 6 without repetition is

The sum of the digits in unit place of all the numbers formed using the digits 3,4,5,6 without repetitions, the no. of such numbers are

The sum of the digits in the unit place of all the numbers formed with the help of 3,4,5,6 taken all at a time is

The sum of the digits in unit place of all the numbers formed with the help of 3,4,5 and 6, taken all at a time, is :

The sum of the digits in tens place of all numbers formed with the digits 1,2,3,4,5 taken all at a time without repetition is

The sum of the digits in the unit place of all numbers formed with the help of 3,4,5,6 taken all at a time is

The sum of the digits in unit place of all the numbers formed with the help of 3,4,5,6 taken all at a time is