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 integers between 1 annd 1000000 have the sum of the digit equal to 18?

Find the number of natural numbers which are less than 2xx10^8 and which can be written by means of the digit 1 and 2.

Find the sum of all natural numbers lying between 100 and 1000, which are multiples of 5.

How many numbers are there between 500 and 1000 which have exactly one of their digits as 8.

Find the sum of all natural numbers between 100 and 1000 which are multiples of 7.

Find the sum of odd integers from 1 to 2001.

Find the sum of all even number between 1 to 350.

Find the number of three-digit number in which repetition is allowed and sum of digits is even.

Find the sum of all numbers between 200 and 400 which are divisible by 7.