Importance Of Digit Sum

The total number of 3-digit numbers, whose sum of digits is 10, is

The total number of 3-digit numbers, whose sum of digits is 10, is __________.

The number of 5digit number such that sum of digits is even

A three digit number abc is 459 more than the sum of its digits.What is the sum of the 2digit number ab and one digit number a?

A two digit number is 4 times the sum of its digits and the unit digit is 3 more than the tens digit . the number is :

The number of six-digit numbers which have sum of their digits as an odd integer, is

Find the number of 3 -digit numbers which are the sums of the cubes of their digits.