Find the number of numbers of six digits without repetition formed with the digits 1,2,3,4,5,6 in which 5 always occurs in the tens place.

Find the number of numbers of 4 digits without repetition formed with the digits 1,2,3,4,5 in which 4 occurs in the thousands place and 5 occurs in the units place.

Find the number of numbers of 4 digits without repetition formed with the digits 1,2,3,4,5 in which 4 occurs in the thousands place and 5 occurs in the units place.

How many even numbers of 5 digits without repetition can be formed with the digits 1,2,3,4 and 5.

How many even numbers of 5 digits without repetition can be formed with the digits 1,2,3,4 and 5.

Find the sum of all four digit numbers (without repetition of digits) formed using the digits 1,2, 3, 4, 5.

The number of 4 digit numbers without repetition that can be formed using the digit 1,2,3,4,5,6,7 in which each number has two odd digits and two digits is

Find te number of numbers of 5 digits that can be formed with the digits 0,1,2,3 and 4 if repetition of digits is allowed.

The number of 4 digit numbers without repetition that can be formed using the digits 1, 2, 3, 4, 5, 6,7 in which each number has two odd digits and two even digits is

Find the number of numbers of 4 digits greater than 3000 that can be formed with the digits 0,1,2,3,4 and 5 if repetition of digits is allowed.