Let N denotes the number of odd integers between 550 and 800 using the digits 4,5,6,7,8 and 9. Find the sum of the digits in N .`

If N denotes the number of integis that lies between 0 and 10^(5) having the digit sum equal to 8, then ((N)/(5)) is equal to

The number of four-digit numbers that can be formed by using the digits 1,2,3,4,5,6,7,8 and 9 such that the least digit used is 4 , when repetition of digits is allowed is

Let a_(n) denote the number of all n-digit numbers formed by the digits 0,1 or both such that no consecutive digits in them are 0. Let b_(n) be the number of such n-digit integers ending with digit 1 and let c_(n) be the number of such n-digit integers ending with digit 0. Which of the following is correct ?

Find the number of integers greatest than 7000 that can be formed with the digits 3, 5, 7, 8 and 9 where no digits are repeated.

Let a_n denote the number of all n-digit positive integers formed by the digits 0, 1, or both such that no consecutive digits in them are 0. Let b_n= The number of such n-digit integers ending with digit 1 and c_n= Then number of such n-digit integers with digit 0. The value of b_6 is

The number of 3 digit odd numbers divisible by 3, using the digits 3,4,5,6 when repetition is allowed,is