The number of numbers between `1 and 10^10` which contain the digit 1 is-

The number of number between 1 and 10 ^(10) which contain the digit 1 is

Mean of the prime numbers between 1 and 10 is

Find the number of integers which lie between 1 and 10^6 and which have the sum of the digits equal to 12.

Find the number of integers which lie between 1 and 10^6 and which have the sum of the digits equal to 12.

Find the number of integers which lie between 1 and 10^(6) and which have the sum of the digits equal to 12.

How many numbers between 10 and 10,000 can be formed by using the digits 1, 2, 3, 4, 5 if No digit is repeated in any number

The number of n-digit numbers which contain the digits 2 and 7, but not the digits 0,1,8,9, is

How many numbers between 10 and 10,000 can be formed by using the digits 1, 2, 3, 4, 5 if Digits can be repeated