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

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 lying between 100 and 1000 can be formed with the digits 0, 1, 2, 3, 4, 5, if the repetition of the digits is not allowed?

The middle digit of a number between 100 and 1000 is zero and the sum of the other digit is 13. If the digits are reversed , the number so formed exceed the original number by 495. Find the number.

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

How many numbers greater than 1000000 can be formed by using the digits 1, 2, 0, 2, 4, 2, 4?

How many numbers are there between 100 and 500 with the digits 0,2,3,4,5 if (i) repetition of digits allowed (ii) the repetition of digits is not allowed

How many numbers are three between 100 and 500 with the digits 0,1,2,3,4,5, ? If (i) repetition of digits allowed (ii) the repetition of digits is not allowed ?