What percentage of numbers from 1 to 30 has 1 or 9 in the unit's digit?

A bag contains balls which are numbered from 1 to 50. A ball Is drawn at random from the bag, the probability that it bears a two digit number multiple of 7.

The number of 5 digited numbers that can be formed using the digits the digits 0,1,2,3,4,5 that are divisible by 5 when repetition is allowed is

The number of five digited numbers greater than 50000 that can be formed by using all the digits 0,1,1,5,9 is

The number of four digit numbers that can be formed using the digits 1,2,3,4,5,6,7,8,9 which are divisible by 3, when repetition of digits is allowed any number of times, is

Find the number of 5 - digit numbers that can be formed using the digits 0,1,1,2,3.

How many 2 digit even numbers can be formed from the digits 1, 2, 3, 4, 5 if the digits can be repeated?

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

Express the following statements as a linear equation in two variables. The sum of a two digit number and the number obtained by reversing the order of its digits is 121. If the digits in unit’s and ten’s place are ‘x’ and ‘y’ respectively.

Find the number of 5-digited numbers that can be formed using the digits 1, 1, 2, 2, 3. How many of them are even.

Find the number of 4 digited numbers that can be formed using the digits 0,1,2.