The sum of the digits of a seven-digit number is 59. Find the probability that this number is divisible by 11.

The digits 1,2,3,.....9 are written in random order to form a nine digit number.Find the probability that this number is divisible by 11 .

The sum of the digits of a four-digit number is 31. What fraction of such numbers are divisible by 11?

A five digit number is formed by the digit 1,2,3,4 and 5 without repetition. Find the probability that the number formed is divisible by 4.

A four digit number is formed using the digits 1, 2, 3, 5 with no repetitions. Write the probability that the number is divisible by 5.

Consider the collection of all 5 -digit numbers such that the sum of digits of each number such that the sum of digits of each number being 43. A number is selected at random from the collection.Find the probability that the number is divisible by 11.

Consider the collection of all 5 -digit numbers such that the sum of digits of each number being 43. A number is selected at random from the collection.Find the probability that the number is divisible by 11.

3-digit numbers are formed using the digits 1, 3, 7 without repetion of digits. A number is randonly selected. What is the probability that the number is divisible by 3 ?

The sum of the digits of a two-digit number is 9. If 27 is added to it, the digit of the number get reversed. Find the numbers